Still too big? They also come in a sixth-barrel size, which contains just over 5 gallons -- the equivalent of roughly 56 bottles of beer. Purchasing a keg in any size is a smart way to save a ...

Kegs always contain the same fluid-ounce capacity regardless of the beer type. But there are several different common keg sizes that ... that 15 ½ gallons shakes out to $1 to $2 per serving ...