The Ultimate Direction 1. 5L Reservoir optimizes hydration for long trail runs, spirited rides on your mountain bike, and hikes in scorching weather. This streamlined 1. 5L Reservoir features a valve that automatically shuts off once you remove the drinking hose, so it doesn't spill all over your kitchen or bathroom counter. Moreover, the drinking hose's on/off bite valve is easy to use while running, hiking, and mountain biking and it won't drip as you move down the trail. The 1. 5L Reservoir folds inside-out for easier cleaning after months of rigorous use and features a smoother outside for sliding it into your hydration pack with ease. Additionally, you'll find the top fold-over closure is convenient to fill from the tap and provides easier access for cleaning it out.