For anyone who's worried about their blinkies failing due to exposure to water, I have a (partial) solution for you. Crack that thing open, and coat the circuit board with nail polish. You can cover everything but the button/switch, battery terminals and LEDs. Make sure you get the leads of the LEDs, too. I recommend clear nail polish, for obvious reasons. But really, any old colour you can swipe from your wife's makeup kit will work.