The term 'party vessel' can refer to two items commonly used for parties: a KEG and a punchbowl. A KEG is a cylindrical container made of metal or wood, often used to store and dispense beer. It typically holds about 15.5 gallons of liquid. A punchbowl is a large bowl, usually made of glass, used to serve a type of mixed drink known as punch. Punch is typically made with fruit juice, soda, and alcohol.