We accidentally put one of my little USB flash drives through a complete wash and dry cycle at the laundromat.
The little case for it got slightly melted and doesn't fit any more, but the cap still fits and... it still works! I'm impressed!
It's a SanDisk "Cruzer Micro" 512 MB. I have a handful of these things (I just bought some 1 GB drives now that they have become dirt-cheap) and they are all different brands, shapes, and sizes. I doubt that all of them would have survived this particular form of abuse!