well jason, imagine a large mixing bowl that has usually 2-8 (depending on the model, some are more socially orientated) tubes coming from the bottom. the idea is to fill the bowl at the top with beer/some awful mix of alcohol, and then on each tube at the end is valve to turn and flood your stomach with alcohol. Each person takes a tube each and tries to drink as much as they can. Needless to say, they cause you to consume large amounts of alcohol in a very short amount of time lol.