A 7.75 gal drum of beer. It is sometimes called a pony keg. It is about one-half the size of a keg, more correctly called a half-barrel (15.5 gal). A single barrel, a standard measure of any liquid other than oil, is 31.5 gallons.

But how much beer is that? (1 gal=128 ounces)

See also: party ball.