These sandals with bottle openers at the bottom so you can walk in the dirt all day then open your beer bottle. Just hope you don't step on any dog poop. :
Mick Fanning's Golf Sandal Has a Built-In Bottle Opener | Man of Many
Men's Fanning Flip Flops with Bottle Opener | REEF®
REEF Phantom Player Leather Brown New Surfer Sandals Flips Dude Bottle Opener | eBay
The Ultimate Sandal: REEF's Bottle Opener Sandals
Reef sandals with or without bottle opener | Reef sandals, Sandals, Mens flip flop
Reef Fanning Bottle Opener Flip Flop Black - 2BigFeet