For years I’ve had a bottle opener on my belt buckle. It’s on the backside of the buckle so it doesn’t look out of place. When you need to pop a bottle, just flip the buckle. I actually was unaware that my belt had the bottle opener built in for the first several years I owned it. Then one day I was putting it on and took a closer look. “What the heck is…. Oh sweet, a bottle opener.” It’s served me very well over the past 10 years or so popping countless bottles for myself and others.
Only downside to the belt buckle bottle opener is that it can look a bit strange if you’re at a party, someone asks you to open your bottle and you proceed to jam the bottle into your crotch and open it. Checkout the belt buckle opener here.