US20020046983A1 - Beverage container cap body - Google Patents

Abstract

A beverage container cap body adapted to make it difficult to be easily unscrewed even though carbonated beverage is contained in a beverage container but make it easy to be smoothly opened even though there is a pressure from inside the beverage container, whereby packings are easily cleaned and the cap body can be equipped upright relative to the container, wherein the cap body comprises a cylindrical body, being releasably and threadably disposed to an inner circumferential wall of opening at a container body, and an upper area thereof protruding above the opening, a lower packing and an upper packing each tightly abutting on a lower side and an upper side of the inner circumferential wall of opening, a cut-out portion9hformed at an upper wall of an insertion groove, of the lower packing and a lid body releasably and threadably disposed at an upper side of the cylindrical body, wherein an opening is formed at part of a ceiling wall of the lid body while a seal member is disposed at an inner side of the ceiling wall for covering an entire area of opening of the cylindrical body and concurrently blocking the opening of the ceiling wall.

Description

BACKGROUND OF THE INVENTION
• 1. Field of the Invention[0001]
• The present invention relates to a beverage container cap body, and more particularly to a beverage container cap body adapted to preserve even the carbonated beverage.[0002]
• 2. Description of the Prior Art[0003]
• Generally, a cap body installed at a metallic dual heat-insulating thermos bottle, which is a kind of beverage container, includes a cap made of synthetic resin and releasably threaded and disposed at an opening of container body, and an opening and closing member for opening and closing the opening.[0004]
• This kind of beverage container is largely understood to interpose a packing for keeping watertightness in between an opening of container body and a lid body for opening and closing the opening, or between a cap member releasably and threadably disposed at the opening of the container body and a lid body for opening and closing the opening of the cap member.[0005]
• Furthermore, in general, the cap body of beverage container releasably and threadably disposed at an inner circumferential wall of opening of the container body is equipped at a lower circumference thereof with a packing for closely abutting on a step portion of an inner circumferential lower area of opening at the container body in order to maintain a watertightness at the packing.[0006]
• However, there is a problem in the beverage container cap body thus constructed according to the prior art in that, when carbonated beverage is put into and water-tightened in the beverage container, pressure in the container is raised, and is applied toward unscrewing direction of a cap body, resulting in fear of unscrewing the cap body threaded to an outer circumference wall of opening at the container body.[0007]
• There is another problem in that, when a cap is opened in a container such as thermos bottle or the like disposed with a packing underneath an inner circumferential wall of the opening at the container body, the lower packing is deformed by internal pressure, making it difficult to detach the cap to release the internal pressure in a smooth way and resulting in spouting out the contents the moment the pressure is released, such that manufactures of thermos bottle recommend that users not keep carbonated beverage in the thermos bottle.[0008]
• There is still another problem in that a packing is disposed at an inner side of ceiling wall of the cap body, making it difficult to take out the packing therefrom for a good cleaning when there is a need of cleaning the packing in the cap body of a frequently used beverage container.[0009]
• There is still a further problem in that, in a beverage container disposed with a cap body at an inner circumferential wall of opening at a container body in a releasable and threadable way, there is a clearance or a gap between a threaded part formed at an inner circumferential wall of the opening at the container body and a threaded part formed at periphery of a cap body, such that, when the cap body is screwed up, a packing slantly touches relative to a step portion of the container body and a threaded part at the container and a threaded part at the cap body side go amiss at centerlines thereof such that an upper area of the cap body protruding from an upper side of the container body becomes inclined relative to the container body, making it difficult to stand same upright and presenting an awkward look. There is still a further problem in that there is a possibility of leakage of contents because packing does not uniformly contact an inner circumferential wall of opening at the container body.[0010]
SUMMARY OF THE INVENTION
• The present invention is disclosed to solve the aforementioned problems and it is an object of the present invention to provide a beverage container cap body adapted to make it difficult to be easily unscrewed even though carbonated beverage is contained in a beverage container but make it easier to release the internal pressure smoothly when opening even though there is a pressure from inside the beverage container.[0011]
• It is another object of the present invention to provide a beverage container cap body adapted to make it easy for a packing to be cleaned.[0012]
• It is still another object of the present invention to provide a beverage container cap body adapted to enable to be equipped upright relative to the container when the cap body is screwed to an opening of a container body.[0013]
• In accordance with the objects of the present invention, there is provided a beverage container cap body, the cap body of beverage container releasably and threadably disposed to an inner circumferential wall of an opening at a container body, wherein a cap body of claim 1 is disposed with a lower packing tightly abutting on a lower inner circumferential wall of an opening at the container body and is formed with a cut-out part at an upper wall of an insertion groove at the lower packing,[0014]
• wherein a cap body of[0015]claim 2 includes a hollow body for opening an container body side and is of a closed structure at upper surface thereof,
• wherein a cap body of[0016]claim 3 includes a resilient seal member arranged to block the opening which formed at part of ceiling wall at an inner side of the ceiling wall and to simultaneously cover the opening,
• wherein the cap body of[0017]claim 4 includes a lower packing for tightly abutting to a lower inner circumferential wall of opening at the container body, and a tongue-shaped upper packing tightly abutting on an upper inner circumferential wall of opening at the container body,
• wherein the cap body includes a cylindrical body releasably and threadably disposed at an inner circumferential wall of opening at the container body for protruding an upper part above the opening of the container body, and a lid body releasably and threadably disposed at an upper portion of the cylindrical body for opening and closing opening of the cylindrical body.[0018]
BRIEF DESCRIPTION OF THE DRAWINGS
• For fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings in which:[0019]
• FIG. 1 is an upper sectional view of a beverage container for illustrating a first embodiment of the present invention;[0020]
• FIG. 2 is an upper sectional view of a beverage container for illustrating a second embodiment of the present invention;[0021]
• FIG. 3 is a sectional view taken along line II-II of FIGS. 1 and 2;[0022]
• FIG. 4 is an upper sectional view of a beverage container for illustrating a third embodiment of the present invention;[0023]
• FIG. 5 is an upper sectional view of a beverage container for illustrating a fourth embodiment of the present invention; and[0024]
• FIG. 6 is an upper sectional view of a beverage container for illustrating a fifth embodiment of the present invention.[0025]
DETAILED DESCRIPTION OF THE INVENTION
• Preferred embodiments of the present invention will now be described in detail with reference the accompanying drawings.[0026]
• FIGS. 1 and 3 illustrated the first embodiment of the present invention, where the beverage container[0027]1 includes acontainer body2 of heat-insulating structure and acap body3 releasably disposed to an upper side of thecontainer body2. Thecontainer body2 serves to integrally join upper ends of an innermetallic container4 and an outermetallic containers5 having an opening thereon, and also has an heat-insulatingpart6 of vacuum heat-insulating structure between the twocontainers4 and5.
• The[0028]inner container4 is formed with a body4a,ashoulder portion4bthat is continued from the body4awith a narrowing diameter, aneck portion4cthat is continued from theshoulder portion4bwith a little bit larger diameter than that of an uppermost portion of the shoulder portion, astep portion4dformed underneath theneck portion4cand a threadedportion4eformed at an inner circumferential wall of theneck portion4cfor being threaded to thecap body3.
• The[0029]outer container5 includes abody5afitted with agrip ring7 of synthetic resin at outside thereof, aneck portion5bformed with a threadedportion5cat an outer circumference wall thereof for screwing aneck member8 of synthetic resin.
• The[0030]cap body3 is disposed with acylindrical body9 of synthetic resin detachably and threadably disposed at the threadedportion4eof an inner circumferential wall of opening at thecontainer body2 for protruding at an upper section thereof above the opening at thecontainer body2, and alid body10 of synthetic resin detachably and threadably installed at an upper portion of thecylindrical body9 for opening and closing the opening of thecylindrical body9.
• The[0031]cylindrical body9 is composed of abody9ascrewed to the threadedportion4eof theinner container4, ashoulder portion9bthat is continued from an upper portion of thebody9aand is protruded above the opening of thecontainer body2, and aneck portion9cthat is continued to an upper portion of theshoulder portion9bwhere diameter is narrowed at theneck portion9c.
• The[0032]body9ais peripherally formed with a threadedportion9dto be screwed to the threadedportion4eat theinner container4 while the threadedportion9dis formed thereunder with aninsertion groove9eoflower packing11 for closely abutting on an inner circumferential wall of thestep portion4dat theinner container4 and is disposed thereon with anotherinsertion groove9fofupper packing12 for closely abutting on an upper inner circumferential wall of the threadedportion4eat theinner container4. Theinsertion groove9eof thelower packing11 is formed at anupper wall9gthereof with a cut-out portion9h.
• Furthermore, the[0033]shoulder portion9bis fixedly installed at a periphery thereof with agrip member13 for threadedly moving thecylindrical body9. Theneck portion9cis peripherally disposed with a threaded portion9ifor screwing thelid body10.
• The[0034]lid body10 is composed of acircumferential wall10aand aceiling wall10b.Thecircumferential wall10ais formed at an inner circumference wall thereof with a threaded portion10cfor screwing the threaded portion9iof thecylindrical body9.
• The[0035]circumferential wall10ais also disposed at a lower periphery thereof with aconnection portion10dfor connecting with string-shaped connectingmember14, connectingmember14 being connecting with theneck member8. Theceiling member10bincludes acircular opening10eat a midsection thereof, and acylindrical protruder10fencompassing a lower circumference of the opening10e.Theceiling wall10bis equipped therein with aseal member15 of flexible material, by way of example, resilient material, for covering an entire surface of the opening at thecylindrical body9. Theseal member15 includes aperipheral wall15afitted into theceiling wall10band an upper margin of opening at thecylindrical body9, abend portion15bfor insertion into theprotruder10fand ablocker15cfor insertion into the opening10eat an inner side of theprotruder10f.
• It should be noted however that, in preference to the sealing[0036]member15, a ring-shaped seal member tightly abutting on an upper margin of the opening at thecylindrical body9 and a resilient member having a hat shape at cross-sectional view thereof for insertion into the opening10emay be used.
• When the[0037]cylindrical body9 is threaded to an inner circumferential wall of the opening at thecontainer body2 in the construction thus described, theupper packing12 slides to contact the inner circumferential wall of the opening of thecontainer body2 to allow thelower packing11 and the entire circumference of theupper packing12 uniformly touch an inner circumferential wall of the opening, even though thelower packing11 is tilted and threaded by the clearance between the threadedportion4eof theinner container4 and the threadedportion9dof thebody9aat the cylindrical body, thereby enabling the center of thecylindrical body9 to match the center of the opening. Thecylindrical body9 is therefore disposed to thecontainer body2 in upright state.
• Furthermore, it should be apparent that the[0038]lower packing11 of O-ring having a circular shape at cross-sectional view thereof, can maintain watertightness at thestep portion4dof theinner container4.
• It should be also noted that, in the present embodiment, the[0039]upper packing12 can cope with eccentricity of theinner container4 by way of its tongue (┐) shape at cross-sectional view thereof.
• Likewise, when the[0040]container body2 threaded by thecylindrical body9 is filled with carbonated beverage, and thelid body10 is put on thecylindrical body9, thecylindrical body9 is diametrically expanded by the pressure in thecontainer body2 which rises in response to generation of carbonic acid gas in the carbonated beverage to thereby reinforce a theaded coupling between the threadedportion9dand the threadedportion4eof theinner container4 and to simultaneously abut the lower andupper packings11 and12 on the inner circumferential wall at theneck portion4cof theinner container4. By this, thecap body3 becomes a structure which can hardly be stripped of thecontainer body2.
• In order to take off the tightly-contacted[0041]cap body3, thegrip member13 is held to be rotated toward unscrewing direction of thecap body3, whereby thecylindrical body9 is moved upward and concurrently thelower packing11 is moved outward by pressure to generate a gap at theinsertion groove9eand internal pressure of thecontainer body2 is released through the gap and the cut-out portion9hto outside of thecontainer body2 through the cut-out portion9h,thereby weakening the threaded coupling between the threadedportion9dof thecylindrical body9 and the threadedportion4eof theinner container4 and simultaneously weakening the tightness of thelower packing11 to an easy stripping of thecap body3.
• Furthermore, slippage can be prevented by forming the[0042]grip ring7 at outside of thebody5aand thegrip member13 for moving thecylindrical body9 by way of screw motion with resilient member such as elastomer resin or the like, thereby enabling to easily and surely coupled or detach thecylindrical body9 by way of screw motion.
• Likewise, an upper portion of the[0043]cylindrical body9 is made to protrude above the opening of thecontainer body2 to make a hollow space in the cylindrical body, such that, even though pressure is raised in thecontainer body2, buffer effect can be obtained for keeping the pressure in the hollow space.
• When resilience of the[0044]blocker15cat theseal member15 of thelid body10 is weakened, theblocker15cof theseal member15 is expanded outwardly from the opening10eof thelid body10 when the pressure in thecontainer body2 is raised, enabling to check pressure state within thecontainer body2 with thelid body10 still disposed thereon.
• Even when the pressure within the[0045]container body2 is raised by hot beverage or the carbonated beverage in thecontainer body2, pressure within thecontainer body2 can be detected as well without opening thelid body10.
• When cleaning the[0046]seal member15, theblocker15cin the opening10eof thelid body10 opened from thecylindrical body9 is pressed inwardly to thereby enable to take off theseal member15 for being fully cleaned thereof.
• Still furthermore, the[0047]blocker15ccan be made to stand out by changing colors of theblocker15cat theseal member15 in contrast with theceiling wall10bof thelid body10. Thelid10 cannot be flung away while thelid body10 can be easily opened even if there remains a small amount of pressure in thecontainer body2 when a space between a ring member rotatably coupled by being inserted into a lower side of thelid body10 and theneck member8 of thecontainer body2 is connected by a strip-shaped connectingmember14.
• The connecting[0048]member14 can be shortened by way of using resilient member for material thereof, such that the connectingmember14 will not be loosened any more and poses no hinderance.
• FIGS. 2 and 3 each illustrate a second embodiment of the present invention, where throughout the drawings like reference numerals are used for designation of like or equivalent parts or portions as in the first embodiment for simplicity of illustration and explanation.[0049]
• A threaded[0050]portion9dis formed thereunder with aninsertion groove9eoflower packing11 of circular shape at cross-sectional view thereof for closely abutting on an inner circumferential wall of astep portion4dat aninner container4 and is disposed thereon with anotherinsertion groove9fof tongue-shaped upper packing12 for closely abutting on an upper inner circumferential wall of a threadedportion4eat theinner container4. Theinsertion groove9eof thelower packing11 is formed at an upper wall thereof9gwith a cut-out portion9h.
• The[0051]lid body10 includes acircumferential wall10aand aceiling wall10bwhile theceiling wall10bis disposed therein with a ring-shape seal member115 for closely abutting on a periphery of opening at acylindrical body9.
• When the[0052]cylindrical body9 is threaded to an inner circumferential wall of the opening at acontainer body2 in the construction thus described, the upper packing12 slides to contact the inner circumferential wall of the opening of thecontainer body2 to allow thelower packing11 and the entire circumference of the upper packing12 uniformly touch an inner circumferential wall of the opening, even though thelower packing11 is titled and threaded by the clearance between the threaded portion49 of theinner container4 and the threadedportion9dof thebody9aat the cylindrical body, thereby enabling the center of thecylindrical body9 to match the center of the opening. Thecylindrical body9 is therefore disposed to thecontainer body2 in upright state.
• Furthermore, it should be apparent that the[0053]lower packing11 of O-ring having a circular shape at cross-sectional view thereof, can keep watertightness at thestep portion4dof theinner container4.
• It should be also noted that, in the present embodiment, the upper packing[0054]12 can cope with eccentricity of theinner container4 by way of its tongue (┐) shape at cross-sectional view thereof.
• Likewise, when the[0055]container body2 threaded by thecylindrical body9 is filled with carbonated beverage, and thelid body10 is put on thecylindrical body9, thecylindrical body9 is diametrically expanded by the pressure in thecontainer body2 which rises in response to generation of carbonic acid gas in the carbonated beverage to thereby reinforce a theaded coupling between the threadedportion9dand the threadedportion4eof theinner container4 and to simultaneously abut the lower andupper packings11 and12 on the inner circumferential wall at theneck portion4cof theinner container4. By this, acap body3 becomes a structure which can hardly be stripped of thecontainer body2.
• In order to take off the tightly-contacted[0056]cap body3, agrip member13 is held to be rotated toward unscrewing direction of thecap body3, whereby thecylindrical body9 is moved upward and concurrently thelower packing11 is moved outward by pressure to generate a gap at theinsertion groove9eand internal pressure of thecontainer body2 slips out from the gap to outside f thecontainer body2 through the cut-out portion9h,thereby weakening the threaded coupling between the threadedportion9dof thecylindrical body9 and the threadedportion4eof theinner container4 and simultaneously weakening the tightness of thelower packing11 to an easy stripping of thecap body3.
• Furthermore, slippage can be prevented by forming the[0057]grip ring7 at outside of thebody5aand thegrip member13 for moving thecylindrical body9 by way of screw motion with resilient member such as elastomer resin or the like, thereby enabling to easily and surely coupled or detach thecylindrical body9 by way of screw motion.
• Likewise, an upper portion of the[0058]cylindrical body9 is made to protrude above the opening of thecontainer body2 to make a hollow space in the cylindrical body, such that, even though pressure is raised in thecontainer body2, buffer effect can be obtained for keeping the pressure in the hollow space.
• FIG. 4 illustrates a third embodiment of the present invention, where like reference numerals are used for designation of like or equivalent parts or portions as in the first embodiment for simplicity of illustration and explanation.[0059]
• In FIG. 4, a[0060]lid body20 releasably and threadably disposed at a threadedportion4eat an inner circumferential wall of opening atcontainer body2 is a blocker by way ofceiling plate20 against an upper side of hollow body20afor opening thecontainer body2, where, the hollow body20ais formed at an outer periphery thereof with a threadedportion20cfor being screwed to the threadedportion4ewhile the threadedportion20cis coupled by alower packing11 and anupper packing12 respectively.
• In the construction thus described, the hollow body[0061]20ais diametrically expanded by pressure in thecontainer body2 raised by carbonic acid gas generated from carbonated beverage in thecontainer body2 to reinforce threaded coupling between the threadedportion20cand the threadedportion4eofinner container4, and simultaneously closely abut thelower packing11 and the upper packing12 to an inner circumferential wall atneck portion4cof theinner container4. By this, thelid body20 is made to be difficult in being taken off from thecontainer body2. Furthermore, as the hollow body20aof thelid body20 is hollow, buffer effect can be obtained for keeping pressure to the hollow portion even though pressure rises in thecontainer body2.
• FIG. 5 is a fourth embodiment of the present invention, where like reference numerals are used for designation of like or equivalent parts or portions as in the first embodiment for simplicity of illustration and explanation.[0062]
• A cup-shaped[0063]lid body120 is formed at an inner circumference of acircumferential wall120awith a threaded portion120bfor being screwed to a threadedportion5cofcontainer body2. A ceiling wall120cincludes a circular opening120dat a central portion thereof and acylindrical protruder120efor encompassing a lower circumference the opening120d.The ceiling wall120cis equipped therein with aresilient seal member15 for covering an entire surface of opening at thecontainer body2 as in the first embodiment.
• FIG. 6 is a fifth embodiment of the present invention where like reference numerals are designated for like or equivalent parts or portions as in the first embodiment.[0064]
• A[0065]cap body220 releasably and threadably disposed at a threadedportion4eof an inner circumferential wall at opening ofcontainer body2 is aceiling plate220bfor blocking an upper side ofhollow body220aand abottom plate220cfor blocking a lower side of thehollow body220a.Thehollow body220ais formed at an outer periphery with a threadedportion220dfor being screwed to the threadedportion4e. However it should be apparent that the threaded portion may be coupled thereunder by alower packing11 and may be coupled thereon by anupper packing12.
• In this construction, when the[0066]cap body220 is threaded to an inner circumferential wall of opening at thecontainer body2, theupper packing12 is made to slide to contact the inner circumferential wall of opening at thecontainer body2 by clearance between the threadedportion4eofinner container4 and the threaded portion20dat thecap body220 even though thelower packing11 is tilted to be coupled by way of thread motion, to enable entire circumferences of thelower packing11 and the upper packing12 to uniformly contact the inner circumferential wall of the opening and the center of thecap body220 to accord with the center of the opening, such that thecap body220 can be disposed to thecontainer body2 at an upright position.
• Furthermore, it should be noted that the shape of seal member may not be limited to that of each embodiment but may be of plate or hat shape at cross-sectional view thereof according to the shape of ceiling wall of lid body. Although the above embodiment has described carbonated beverage in the[0067]container body2, the present invention is not limited thereto but can be applied to hot beverage having a rising pressure due to vibration applied thereof.
• As apparent from the foregoing, there is an advantage in the beverage container cap body according to the first embodiment of the present invention thus described in that a cap body of beverage container threadedly and releasably disposed at an inner circumferential wall of opening at container body is equipped with a lower packing for tightly abutting on a lower portion of the inner circumferential wall of opening at the container body and a cut-out portion is formed at an upper wall of insertion groove at the lower packing, such that, when pressure rises in the container body, the lower packing is tightly abutted on the inner circumferential wall of the container body, making it difficult to remove the cap body even when carbonated beverage is filled therein, and when the cap body is to be taken off, the cap body is rotated to an unscrewing direction, whereby the lower packing is outwardly pressed and moved by pressure to generate a gap at the insertion groove and inner pressure of the container body is released outside of the container body from the gap through the cut-out portion, such that the lower packing is weakened at closeness thereof to allow the pressure to be smoothly released when the cap body is opened.[0068]
• There is an advantage in the second embodiment of the present invention thus described in that an upper surface of hollow body at a cap body for opening a container body side is closed such that when pressure in the container body rises, a lower packing is made to tightly abut on an inner circumferential wall of opening at the container body and concurrently, the hollow body is diametrically expanded to reinforce a threaded coupling with the container body, thereby making it difficult to take off the cap body when carbonated beverage is filled therein and enabling to obtain a buffer effect for keeping a pressure in the hollow body even though pressure rises in the container body.[0069]
• Furthermore, the cap body includes a cylindrical body detachably and threadably disposed at the inner circumferential wall of opening at the container body to enable to protrude above the opening of the container body and lid body releasably and threadably disposed at an upper surface of the cylindrical body for opening and closing an opening of the cylindrical body, such that when pressure in the container body rises, a cylindrical body is diametrically expanded to reinforce a threaded coupling between the container body and the lid body, making it difficult to unscrew the cap body even when carbonated beverage is filled in the container.[0070]
• There is an advantage in the third embodiment of the present invention in that a cap body releasably and threadably disposed at an opening of container body is formed with an opening at a part of ceiling wall while a resilient seal member for block the opening of the ceiling wall and for covering an entire area of the opening is installed at an inner wall side of the ceiling wall, such that when seal member within opening of lid body is pressed from the outside, seal member can be taken off from the lid body and the seal member can be fully cleaned. Furthermore, when resilience of the seal member is made to be weakened, the seal member in the opening is expanded while pressure within the container body rises, to enable to check a pressure state within the container body.[0071]
• There is an advantage in the fourth embodiment of the present invention in that a cap body releasably and threadably disposed at an inner circumferential wall of opening at container body includes a lower packing closely abutting on a lower side of inner circumferential wall of opening at the container body and an upper packing tightly abutting on an upper side of inner circumferential wall of opening at the container body, such that resistance to turning effect is small and detachment and attachment are readily available with less power when screws are coupled, where, the upper packing slides to contact the inner circumferential wall of opening at the container body by clearance between threaded portion of the container body and threaded portion of the cap body even if the lower packing is tilted to get threaded coupling when the cap body is threaded to couple to the inner circumferential wall of the container body, to thereby enable the entire circumference of the lower packing and the upper packing to uniformly touch the inner circumferential wall of the opening and the center of the cap body to accord with the center of the opening, whereby the cap body is disposed in upright position to the container body to improve appearance of the beverage container.[0072]

Claims (5)

What is claimed is:

1. A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wall of opening at a container body, wherein the cap body is disposed with a lower packing tightly abutting on a lower inner circumferential wall of opening at the container body and is formed with a cutout part at an upper wall of an insertion groove for the lower packing.

2. A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wail of opening at a container body, wherein the cap body comprises a hollow body for opening a container body side and is of a closed structure at upper surface thereof.

3. A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wall of opening at a container body, wherein the cap body comprises a resilient seal member arranged to block the opening at part of ceiling wall at an inner side of the ceiling wall and to simultaneously cover the opening.

4. A beverage container cap body, the cap body releasably and threadably disposed to an inner circumferential wall of opening at a container body, wherein the cap body comprises:

a lower packing for tightly abutting to a lower inner circumferential wall of opening at the container body; and

a tongue-shaped upper packing tightly abutting to an upper inner circumferential wall of opening at the container body.

5. A beverage container cap body as defined in one ofclaim 1 toclaim 4, wherein the cap body comprises:

a cylindrical body releasably and threadably disposed at an inner circumferential wall of opening at the container body for protruding an upper part thereof above the opening of the container body; and

a lid body releasably and threadably disposed at an upper portion of the cylindrical body for opening and closing opening of the cylindrical body.

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