The creators of coin want to slim your wallet down to a multi-function card designed to emulate and replace debit and credit cards. This may be the only card you'll have to carry!

While Google's Wallet and iOS Passbook aims to do that too, there's still the habit of carrying a physical wallet.  The Bluetooth-connected Coin features an integrated black and white e-ink display. It has a two year battery, and a magnetic stripe that be swapped.

There's an iOS and Android app, so users can swipe multiple debit, credit and even gift cards and upload the details onto the Coin. The card's single mode button and basic display can toggle which payment card they'd like to use and can be swiped through any standard card reader.

The Coin card is expected to arrive sometime next summer, but starting today its creators are accepting pre-orders through a crowdfunding campaign at $50—which is half the list price. Check out the video of it below: [Only Coin]