How many hydration bladders have you killed putting something other than water in it (sports drink, Kool Aid, Jack and Coke)? If only you could fit your big fat hand in it to clean it...no offense. With the 3L top fill hydro tanker from 3V Gear your woes are over! Open up the tanker by rotating the two red tabs on the top and separating the sides. It is like big a zip lock bag on steroids. Now you can easily fill and clean your tanker any time. The bite valve rotates to seal off your liquids from dripping when you are not using it. What are you waiting for? If the 3L is too big check out the 2L version or combined it with our Versa Flow Light-Weight Water Filter