waterproof and cheap flashlight

I want to buy a flashlight for geocaching and for other uses. I would like it to be waterproof and float if dropped in water. Any suggestions on a good one? I don't want to bother with a headlamp because

I would like to also use it like a normal flashlights when not geocaching.

edit: Oh, forgot something. I don't want to spend a ton of money on a flashlight. I was thinking of

under $30 if that is possible; not looking for the best of the best just a good one.

the dorcy seems to get pretty good reviews, even though it may look a bit cumbersome.

link: http://www.amazon.com/Dorcy-41-4750-Lumen-Flashlight-Batteries/dp/B002OOZERY/ref=sr_1_1?ie=UTF8&qid=1315472265&sr=8-1