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Acruet (/ˈkruːɪt/), also called acaster,[1] is a small flat-bottomed vessel with a narrow neck. Cruets often have a lip or spout and may also have a handle. Unlike a smallcarafe, a cruet has astopper or lid. Cruets are normally made of glass, ceramic, stainless steel, or copper.

Cruets today typically serve aculinary function, holding liquid condiments such asolive oil andbalsamic vinegar. They often have a filter built into them to act as a strainer, so that vinegar containing herbs and other solid ingredients will pour clear. Cruets also serve as decanters forlemon juice and other oils.
They are also used for the serving of the wine and water in the ChristianMass, especially those of theRoman Catholic,Lutheran, andAnglican traditions.
TheEnglish word "cruet"originates with theOld Frenchcrue, "earthen pot".[2]Some[quantify] speculate that the early use of cruets was ecclesiastical[citation needed]—there is for example Biblical use of a "cruse of oil", a jug or jar to hold liquid (IKings 17:16).
A few cruets dating from theMedieval ages still exist today. Its culinary use, however, was first introduced in the late 17th century.Cardinal Mazarin had a pair of salad cruets on his dining table at his home in France,[citation needed] one for olive oil and the other for vinegar.
The use of oil and vinegar cruets rapidly spread throughout Italy, where oil and vinegar were already in frequent use. Oil and vinegar cruets are common on Italian and Portuguese tables to this day.[citation needed]

Cruets range from nominal decanters to the highly decorativecut glass. Some cruets are unusual, and can either be intended to be ornamental or functional.
During someChristian religious ceremonies, primarily theEucharist,altar cruets are used to keep thesacramental wine and water. These cruets are usually made of glass, though sometimes they are made of precious metals such as gold or silver. Cruets specifically intended for religious ceremonies come in pairs: one to contain water, often markedA forAqua, and one to contain wine,V forVinum. These two liquids are mixed during the portion known as the Preparation of the Gifts.