Reef Stash Sandles

Stash sandals are comfortable enough to wear on the beach, but their real utility is as a mobile safe. The secret tray in the sole slides out to hold personal items and slides back in to make sure no one knows they're there. It's something Q might have cooked up if Bond ever decided to take up surfing. From Time Magazine.
http://www.time.com/time/specials/packages/article/0,28804,1827576_1827591_1828237,00.html