A select favorite, Answers hydration bladders are versatile and tough. A large screw cap opening for easy cleaning and filling finishes off the 100% leakproof design. Choose from the compact and race inspired 1.5 liter or from the larger endurance-focused 3 liter bag.. 1.5L features a single hanger slot for easy drying and mounting. 3L features a dual hanger slot for easy drying and mounting. 100% leakproof design. High-flow bite valve.