Maybe I should have suggested that they throw them in the laundry like boykster. 
Just a note....the laundry machine is NOT the recommended method of cleaning the USB connector

Pretty much any portable data solution is going to have a risk of failure. When I was at university I lost numerous reports / papers due to floppy drive failure. At the UW computer labs we were not allowed to save data on teh hard drive and had to rely on floppies. We all know how reliable floppies are, right?

Iomega zip drives, yep, lost tons of work data to the click of death
Removable hard drives are great, but I've had one of those go south on me from being lugged around all the time. The smaller ones like Zero_Hour has are better, because you can keep em in your pocket or somewhere more safe than just in the bottom of your briefcase.