Features: Hose connected to the bottom of the bladder Can be placed in a backpack and the backpack's shoulder strap Can be used to store water Delivery quantity: 1 piece Product color: blue Product size: 2L Material: Transparent EVA, good wear resistance and compression resistance. It is recommended to drink it below -20C to 50oC to avoid burns. Weight: 135g How to use: As long as you bite the nozzle to absorb water, a cool and refreshing spring will be poured into your mouth immediately, and it will automatically close when you release it, completely freeing your hands. Material: New environmentally friendly food-grade material, with the following advantages: A. Strong wear resistance, ordinary materials will rub during use. Scraping will cause the surface to gradually wear, and EVA has excellent wear resistance, which is more than 50 times more wear-resistant than natural rubber. B. Good bending resistance, many plastic materials are prone to breaking under repeated stress, EVA can maintain excellent bending resistance in various environments. C. Hydrolysis resistance EVA has good hydrolysis performance at room temperature and will not undergo significant hydrolysis within 1-2 years. D. Tear properties Tear strength is to assess a material's ability to resist tearing, and EVA has a high degree of tear resistance. E. Good resistance to high temperature and oxidation