A small barrel is a type of container used to store and transport liquids, such as beer, wine, or other beverages. It is typically made of wood or metal and is smaller than a standard barrel. The term 'small barrel' can refer to three different types of containers: a KEG (3 letters), a CASK (4 letters), or a rundlet (7 letters). A KEG is a cylindrical container with a single opening at the top, usually made of stainless steel. A CASK is a barrel-shaped container with two openings, one at the top and one at the bottom, and is usually made of wood. A rundlet is a small wooden barrel with a single opening at the top, and is typically used for transporting liquids.