A liquor holder is an object used to store and transport alcoholic beverages. The most common types of liquor holders are flasks, CASK, and vats. A FLASK is a small, narrow-necked container typically made of metal or glass, used to store and transport small amounts of liquid. A CASK is a large barrel-shaped container, usually made of wood, used to store and transport larger amounts of liquid. A VAT is a large, open-topped container, usually made of metal, used to store and transport even larger amounts of liquid.