You can drink water without having to take the bottle out of your backpack. Features: Easily transforms a threaded hole bottle into a handy hydration tank. Adopts food grade TPU,PE and silicone material, safe, BPA free, durable to use. Easily attach to most water bottles with 28mm/30mm thread. The transparent hose can be adjusted as needed. Total Length: 40cm / 5.5in. Handy clip for easy attachment of the hose to your backpack or elsewhere. Soft bite mouthpiece with dust cover, make sure to have water cleaning. There is a connected strap between the dust cover and the bite mouthpiece that will not lose the dust cover by accident. Air valve (color random) to prevent leakage easily. The clear V-shaped hose ensures a fast flow of water. Suitable for trekking, fishing, climbing, hiking, rafting, canoeing, boating, kayaking, cycling, etc. Specifications:Material: Food Grade TPU + Silicone + PE Clear Hose Length: 80cm/31.5in Clear Hose Length: 40cm/15.7in Package Size: 18*14*4cm/7.1*5.5*1.6in Package Weight: Approx. 128g / 4.5oz Package List:1 * Water Bottle Hose