The Knockout: A Beer Bong & Gravity Bong Combo
The Knockout is a badass invention that allows you to take partying to the next level. This cool party piece can be used in a variety of ways. Instantly turn any bottle into a beer bong, a gravity bong, and a good old regular bong but really the best way to use it is the KNOCKOUT way. The gravity and beer bong combo. Check out the video on how to use it.
$34 BUY IT HERE