Dama juana

A carboy (or carbouy), demijohn, or jimmyjohn is a rigid container with a typical capacity of 20 to 60 litres (5 to 16 US gal). Carboys are primarily used for transporting liquids, often water or chemicals.

They are also used for in-home fermentation of beverages, often beer or wine.

The word is from the Persian qarābah (), from Arabic qarrāba, "big jug".

originally referred to any glass vessel with a large body and small neck, enclosed in wickerwork. The word presumably comes from the French dame-jeanne, literally "Lady Jane", as a popular appellation; this word is first attested in France in the 17th century. An alternative etymology derives it from the name of a Persian town, Damghan, but there is no evidence for this.

Carboys come in various volumes ranging from 4 to 25 L (1.1 to 6.6 US gal). The term carboy itself usually refers to a 19 L (5.0 US gal) carboy, unless otherwise noted. A 4.5 L (1.2 US gal) carboy is usually called a jug. A 57 L (15 US gal) carboy is usually called a demijohn (in the Philippines, dama juana.)

In Britain, "demijohn" refers to a 4.5 litre (imperial gallon) glass brewing vessel.

Containers of this type in the United States have no specific volume and are called "jimmyjohns".

In brewing, a carboy or demijohn is a glass or plastic vessel used in fermenting beverages such as wine, mead, cider, perry, and beer. Usually it is fitted with a rubber stopper and a fermentation lock to prevent bacteria and oxygen from entering during the fermentation process.

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