Here is a cool beer bong attachment for your wild parties: the Knockout can turn any beer bottle into a beer bong. Just seal it onto any bottle, and you will be able to drink fast without spilling your drink. Remove the bottom part, and you will be able to drink even faster.
The Knockout is made of food-grade silicone and stainless steel. You can break it down for easy storage. This versatile tool can turn your beer bottle into a beer shotgun, water pipe, gravity pipe, beer gravity pipe, and more. Sets you back under $40.