I usually take two bottles of water with me on a 25 mile bike ride. It's actually pretty common that I don't take a sip of water for the whole ride, because I

I usually take two bottles of water with me on a 25 mile bike ride. It's actually pretty common that I don't take a sip of water for the whole ride, because I never got thirsty. I suffer no ill effects, nor decrease in performance. And this is in line with all of the actual science. No one has yet to identify that drinking, or not drinking, a certain amount of fluid causes any ill effects or decrease in performance outside of just drinking when you're thirsty.