You can drink water without having to remove the bottle from your backpack. Features: Easily turns a bottle with a threaded hole into a handy water container. Adopts TPU, PE and silicone food grade material, safe, BPA free, durable to use. Easy attachment to most water bottles with 28mm or 30mm thread. The transparent hose can be adjusted as needed. Total length: 40 cm or 5,5 inches. Handy clip for easy attachment of hose to backpack or elsewhere. Soft mouthpiece with dust cover, make sure you have clean water. There is a combined strap between the dust cover and the bite mouthpiece so that you don't accidentally lose the dust cover. Air valve (random color) to prevent easy leakage. The V-shaped transparent hose design ensures fast water flow. Suitable for trekking, fishing, climbing, hiking, rafting, kayaking, boating, backpacking, cycling, etc. Technical data: Material: food grade TPU silicone PE Blue hose length: 80 cm or 31,5 inch Length of transparent hose: 40 cm or 15,7 inch Package weight: approx. 128 g or 4,5 oz List of packages: 1 x water bottle hose