It’s not easy being a playing card — a lot of junk gets spilled on you, people constantly bend you and shuffle you around, when after all you’re just a laminated piece of paper. Now throw this duty on a card built for the task — Invisible Playing Cards from CB2 ($7). They have a bulls-eye concealing the suit and rank, and they come in a nifty little plastic case. Oh, and they’re waterproof. [Thanks, Christopher]