Look inside your wallet. We’re willing to bet it’s loaded thick with cards, and if it isn’t, there’s a chance you might not have the one you need when you need it (this really gets our OCD going). Coin solves this problem, for swipeable cards anyway, using a bit of tech wizardry and a whole lot of clever. Just a hair thicker than a standard credit card, Coin takes the place of up to 8 cards, letting you toggle between them using its one and only button. Else, coin communicates wirelessly with your phone using Bluetooth Low Energy, lasts for roughly 2 years without ever needing a charge, and even signals your smartphone if you forget it somewhere or get out of range. And, in case you were wondering, getting cards onto one is a cinch thanks to the Coin app for your smartphone and the included card reader.

Learn more at Coin – $100