My 1GB Iomega (micro mini) USB2.0 thumb drive is small enough that it has a permanent place in my wallet’s coin compartment. Twice since I bought in Dec 2005, it was carelessly slipped into my pocket and went MIA. In both instances it ended up in the washing machine for a wash, spin and rinse.
And survived, heh-heh.
When I bought this in 2005, it was about $90. Now you can get a 1GB flash drive for little over $10. I have not seen Iomega thumbdrives around for a couple of years though. My recent acquisitions were 8GB Imations which cost about $50. Not planing to put those through the washing machine anytime soon, of course.