I recently got a Sandisk Cruzer Micro USB drive and was disappointed to see that a lot of people have the same one at school.
As far as I know they only come in black and since so many people had the same one as me I wanted to be able to separate mine from everyone else's.
While I was trying to think of ways to do it, the guy in front of me threw his gum wrapper on the floor. I slipped my USB drive in and it was a perfect fit!
Since i've done this everyone that has seen it has loved it.