Ultimate Direction Reservoir The Ultimate Direction 100 oz. Reservoir, Easy to fill and clean, is exactly what you need for a perfect run 100% TPU tubing drapes better over the shoulder; while still providing strength and resistance to kinking Top closure is fold-over and slide-closed resulting in never leaking and opens fully for cleaning Reservoir can be turned inside-out for easy cleaning Utilizes a Hypervalve Hose which incorporates an on/off bitevalve The reservoir opening automatically shuts off when the hose is remove BPA Free