No twist top cap—no problem

If you find yourself with a beverage of some sort that requires a bottle opener to get the cap off—and you don’t have the bottle opener, no problem—you have lots of options.
Firstly—don’t use your teeth. They are not meant for opening things. Instead, my recommendation is that you grab any plastic item that has strength and/or a inflexible cap (i.e. another beverage with a cap, deodorant, sunscreen bottle, shampoo bottle, golf club, etc—avoid using your Smartphone) and leverage the item on a 45 degree angle just under the cap—push upwards with your improvised opener and voila—the cap is off and your problem is solved.