Your car key fob is a small but mighty device. Have you ever wondered what would happen if it died while you were, say, at ...

While this is a great usability upgrade, for some reason key fobs continue to be bulky plastic monstrosities that when stuffed into a pocket can easily ruin the lines of a well-chosen outfit.

There's the button that unlocks the car's doors and the one that pops the trunk. And then, on some BMWs, the key fob has a button with a diamond on it.