On my Cannondale RT2 the 2 bottles that are more horizontal always leak. I've tried Polar bottles and Camelbak Podium Big Chills; both leak during a ride. The latter do not leak before a ride, so I assume it is bumps that cause it to leak. Even tried brand new ones - never run through dishwasher - same thing. Problem is I use Gatorade in those bottles (Camelbak backpack for water) and the leaking causes a big sticky mess by the end of the ride. Is there a bottle anyone has that does not leak?