CamelBak UnBottle (70 ounce)

Stay hydrated without trading in your favorite pack! Slipping the UnBottle into any backpack instantly creates an integrated hydration system. TheAntidote reservoir's wide mouth opening makes for easy cleaning and filling, and it's threaded for leakproof outings. Plus, the UnBottle boasts a tough, insulated shell to keep your drink of choice warm or cool.