Jackass the Movie Number Two Burping Bottle Opener This is a super rare item sold in the US when the movie was released in 2006. Unused deadstock. It seems the funny feature is that it makes a burping sound when you open a bottle. The one I tried only made sputtering and noise. It might have deteriorated over time, or maybe kids' goods in America at the time were just like this. Please buy it unopened for your collection. It has a built-in CR2032 lithium battery. You need to unscrew it to replace the battery.