OCZ Mini-Kart 1GB Flash Drive
 

The OCZ Mini-Kart redefines the meaning of thumb drive. While regular USB sticks are your full thumb's length, if not more, the Mini Kart goes merely to your thumb's first segment. With a height of only 2.8mm it is ideal to go into your wallet. This makes it possible to carry up to 2GB of storage around without having to track another thing in your pockets.