Professional military Hydration Bladder, made of Eco-friendly material Eco-friendly material has the following advantages: No plastic taste. High-grade environmentally friendly material profiles. With super toughness, abrasion and heat resistance characteristics. Very easy to use. Suitable for all kinds of hydration pack bag. Mouthpiece with on-off valve to prevent leakage. Just pull out the water switch , unplug the cap, then gently bite the mouthpiece of the pipe, there will be fresh water to your mouth. Large opening for easy cleaning inner surfaces, easy to fill water and ice. Product Details Color:Blue or Army Green or Combination of blue+army green Capacity/SIZE: 2 liter (70 oz )/ 36*17cm Pipe: Length 39.5 inch Large Opening User Instructions: Bike trips, camping, hiking , Running and other outdoor sports. Scrub all parts with baking soda and water: shake, empty and rinse Dry all parts after every use Water Bladder 2L (36*17cm Version) 2L TPU Water bladder with insulated hose cover (39*17cm version) 2.5L TPU hydration bladder with insulated hose cover (43*17cm)