Keg

http://www.stpats.com/images2006/15gallonkeg.jpg

A keg is a large cylindrical container, roughly 2.5 to 3 feet tall, made from aluminum, and typically filled with beer. A keg is a wonderful thing - it's like a never ending cornucopia of booze. It's estimated to contain ~58.6738829 liters when full.

Trivia

Kegs are usually completely sealed. Extracting the contents invloves docking a beer tap to a valve at the top of the tank.