The eGear Pico lite, I believe either designed or endorsed by Doug, is one tough little flashlight. I was washing some jackets last night and when they were tossed into the dryer I immediately heard a clunking sound and instantly knew it was a key chain with gate keys, the eGear Pico lite and a couple of other tools. I’m delighted to report that the little pico light worked fine last night and is still going strong today. I was surprised as I’d first used the soak cycle and then ran the barn jackets through on the longer heavy duty cycle, so it was in water for sometime. I've been very pleased with the little lights and have a couple in kits and on key chains but this was the first real water test and it passed with flying colors! It clicked right on after finding it in the dryer. I did take the batteries out and let it sit all night but there doesn't seem to be any damage.

http://www.essentialgear.com/store/p/117-PICO-Zipper-Lite.html