Coin stores multiple credit card info, aims to slim your wallet down
you see in the picture below promises to be the one credit card to
rule them all. It's called Coin, and while it looks like any other
traditional plastic, it's actually an electronic device that stores all your CC info in one package.Article from engadget.com.
will work with any credit card swiper. Also, it sends an alert to your
phone if you stroll away with your frappuccino having left it on the