By this time, every one of you knows not to get all Costanza with your wallet. Even if you’re going slim or card case now, you can streamline it even more… if you happen to have an iPhone 4. Casemate’s newest creation, the iPhone 4 Card Case, is a simple plastic shell case (much like the one you probably have now) with a slot for two credit card sized items. That could be an ID and a credit card, or two IDs, or two credit cards, or an ID and a Metro Card or, well, you get the idea. If it’s credit card sized, you can fit two of them in the back of this case without obstructing your ability to Instagram.