Designation for a cylindrical (cylindrical) mostly bulbous container made of various materials such as wood, metal, plastic or ceramics for storing liquids. In viticulture, barrels are mostly made of wood because this material is breathable and allows a metered access of oxygen, which is usually desired during wine aging. For filling and emptying it has a small opening called a bung (bung hole). It can also be open on one side and is then fitted with a lid. In the case of large barrels, an access possibility in the bottom(barrel latch) allows one person to clean the barrel. The drum shape allows easy handling, movement and space-saving stacking. Barrels of different types and volumes play an important role with regard to the extension. In the past, the production was carried out by the handicraft profession of the cooper. Today, however, the wooden barrels are mostly industrially produced in companies known as Tonnellerie. The historical development is described in detail under wine barrels.