on the topic of taste, years ago I was given a camelback as a present, used it for x-c skiing a while (has its own problems, specifically freezing hose or mouthpiece, kinda a pain in the rear actually, even with homemade foam insulation put on...but I digress)

the main gripe I always had was teh plasticy taste, has that changed nowadays? This was many years ago and it kinda put me off using it. ended up just going back to nalgenes in insulated "tea cossies"

btw, this wasnt from mould or anything, just the seemingly natural rubber taste of the thing (yes I washed it many times well, but not to my taste (sic)