I have to admit, I'm a bottle opener geek. I've got one on every keyring: One from WARN, one from a parts company, and even one from Tiffany, which was a gift. I've got a bunch at home; I collect 'em. One of my favs (which is not on the key ring) is the Klein Tools 98002, or I like to call it the "Model 5:30."
Do you have an opener that travels with you? I use the one on my keyring for beer when I'm traveling. When we're traveling and need to open a bottle of vino, we've got a mini corkscrew. It was cheap, but it folds into one, compact unit.
And I just saw this, and thought—everyone's had to do this at some point.