Because we'd like to protect you from mistakes we've already made, here's a small list of things we've opened a beer with. All cutlery can be used to pry, but it usually hurts and crushes at least one finger. Lighters also have good leverage, but we've smashed a few in the past and leaking lighter fluid is not to be trifled with. When cell phones were boxy and rugged and we were still obsessed with juvenile insanity, you could use the old boxes to pop the bottle cap — but only if you weren't too attached to your phone. If you don't care too much about undamaged teeth, you can open a beer with your teeth, but that definitely falls into the "juvenile madness" category as well. Table edges, shoe soles, roof battens and keys can also be used to open the door, but their reliability varies.
Opening bottles improperly may save you from acute beer thirst, but you also run the risk of injuring yourself or damaging the bottle. Fortunately, there are countless bottle openers in a handy format these days. The copy from Nikl, for example, is no larger than a business card and is always ready to hand.