Have you asked Camelback? Their website makes them look like they are pretty sociable, and companies often are happy to answer questions like this about their product. (http://www.camelbak.com/
If it's tourist season, why can't we shoot them?
Life is too short for regrets, I want to come to the end of this life bruised, battered, scratched and bleeding, holding a broken bone or two, and yelling "WOW WHAT A RIDE!! LETS DO IT AGAIN!!!!!"