Whether you are searching for a new bladder or simply looking to replace a current one, the Ultimate Direction 1.5L Insulated Reservoir holds enough fluid to keep you hydrated for hours of running while keeping water cool for longer. This bladder uses a top-fill sliding seal for easy filling and the tube disconnects when it's time to clean. As an added benefit, the Reservoir is made with a new PEEVA™ material that adds durability without tainting the taste of your water.