Don't know how I missed this thread, but sure glad to find it. I have a Camelbak "Hydrobak" that I use for long rides. It was a birthday gift last year. I ran with it once, and found that the shoulder straps tended to slip down. I'm going to research the variety of Camelbaks. I'm sure they make one better for running. I hate stuff on my hips, as my belly and hips are the only fat part of me (OK, the boobage, but they don't call that "fat" so much... ), and it just makes me feel fatter. A cold water/ice Camelbak would help me stay cool. I heat up so fast as it is. Thanks guys! I'll let you know what I end up with.

Right now I run with a bottle that has a mesh handle with a little zipper pocket. It's not bad, but I don't like holding anything while running.