I'm sorta like Duck. My bottle skills got a lot better this year, but on any ride longer than say 40 miles, I use my Camelbak and fill 2 bottles with Accelerade, especially when it's hot. I drink the whole 50 oz. of water on a fifty mile ride, plus at least one bottle of Accelerade. I have the small Siren model, which only has a small sip for keys or an energy bar. I hardly ever ride with the Camelbak I have with a backpack in it. That is heavy. The Sren is not.