I use my lighter... trick I learned bartending. Grip tightly around the neck close to the cap, wedge the lighter under your finger and the cap. Leverage on the lighter, and cap pops it off without bending it. I did the counter trick once, and broke the neck of the bottle clean off... man was the guy pissed.
I've seen people do that successfully and to disastrous effect, lol... it's pretty nifty.
... you try to barter for groceries with a leather jacket, a couple sticks of dynamite, an old knife, and a handful of bottle caps.
... every two birthdays you choose a new perk.
... you start thinking flora/fauna doesn't look natural.