iPhone Case with Credit Card Holder

thingiverse

An iPhone 3GS case is available that features a rear slot for storing up to two credit cards. The buttons on each slot are discreetly designed to be almost flush with the exterior, allowing easy card ejection when pressed. After use, simply reload the cards to reset the spring-loaded mechanism controlled by the buttons. This case eliminates the need for carrying a wallet; just ensure your phone is always within reach.