A beer bong is the name commonly given to a device used to drink large amounts of alcohol in relatively small amounts of time (aka funneling). A beer bong usually consists of a hose about 2 feet long, with a funnel on top, and a 3/4 inch ball tap on the bottom.

The user pours alcohol into the funnel, filling the hose up, and also part of the funnel, depending on how much alcohol is used. The user then puts the tap up to their mouth, turns the lever, and drinks the alcohol.

Because of gravity, and because the top of the funnel is open, the alcohol flows freely down the users throat at very high speeds. In a recent competition to see who could down a beer bong in the least amount of time as possible, 2 beer bongs were each filled with 1 330mL of Woodstock, which is bourbon and cola. The times taken to down these beer bongs were around 3 seconds.

The beer bong doesn't work on the same principle as a bong, but rather because of gravity. The liquid is trying to go downward, but is prevented from moving because the tap is closed. When the tap is opened, the alcohol moves smoothly down the users throat, sometimes resulting in excessive vomiting, and sickness.