OCZ's Roadster is small, black and sexy, the material used on the stick is plastic.
When you unfold the stick, the USB plug is revealed. All circuitry is inside the plug metal. This means that there is no cap which you could lose. I think I lost the cap of every single USB stick I have.
For comparison I placed the OCZ Roadster on a CD. As you can see it is really tiny.
The hinge can be moved easily, yet is stays in place until you apply some force.
This small metal dot makes sure that the case locks safely once closed.
With the accessory strap attached you can easily carry the stick around in your pockets without losing it.