The term BEER BUY can be broken down into four crossword solutions: CASE (4 letters), KEG (3 letters), SIXPACK (7 letters), and TWELVEPACK (10 letters). A CASE of beer is a collection of 24 cans or bottles, usually sold in cardboard boxes. A KEG is a large metal container that holds 15.5 gallons of beer, which is equivalent to 165 12-ounce cans or bottles. A sixpack is a collection of six cans or bottles of beer, usually sold in cardboard packaging. A twelvepack is a collection of twelve cans or bottles of beer, usually sold in cardboard packaging.