The Knockout 5-in-1 is a bong attachment that will turn any bottle into a smoking apparatus.
The device has the ability to turn your bottle of Coors Light into a water bong, beer bong or gravity bong. If you're really serious about getting f*cked up, you can turn your bottle into a "knockout," or what the demonstrative video describes as the "the demon spawn of a beer bong and a gravity bong." Anything that appears to be wickedly conceived is definitely of interest!
If you want to get your party started -- or, if you're anything like me, prematurely end it with you hugging the toilet and calling out for your mom -- then try the Knockout 5-in-1.