Over the last few years bottle openers have been popping up everywhere. On the bottom of flip flops seems like a good idea until you step in dog crap that first time. The bike rack for my car is outfitted with them as well. But it’s easy to keep a bottle opener in a car anyway. But a koozie with a bottle opener built in is ingenious. A beer, a koozie, and a bottle opener. You’re set. Check out Cap-a-Cooz and either get a smooth looking koozie featuring their own logo or you can also create your own (the 36 unit minimum at $4.49 is reasonable). They appear to fit both bottles and cans well.