A device made for the express reason of drinking mass quantities of beer quickly. Most easily created using a two-liter bottle and 24 inches of rubber hose. Cut the bottle in half and attach the hose to the neck of the bottle with duct tape. This way, one can pour in many beers at once, and also mark off the levels of the successful beer bongs. No need to "trap the foam off": just drink 'til the foam comes, and then blow it out.