Sure you could win some points and friends by opening your bottle with your teeth, belly button or bare hands but then they're gonna have you do it over and over again. It gets old eventually and those friends and points move to the next guy with the cool trick. Plus, by that time you have cracked teeth, raw hands and cuts on your stomach. Use this guy instead. Diabolix Bottle Opener is the clever design by Biagio Cisotti. Brought to life in 1994 it puts the 'fun' back into 'function'. Diabolix is built to take the knocks while making you smile.
Factoid: Those bumps on the bottom of your bottle aren't decoration, they make it easier for them to move around the factory.