1. Avoid fingers contaminating the buckle, and it is more convenient to apply directly 2. Anti-slip texture design 3. Material: PET 4. Capacity: 550ml, 1500ml, 2600ml 5. Application: office, gym, outdoor 6. Features: One thing, dual use, large capacity water storage, easy to carry 7. Size: 550ml: about 8 x 21cm, 1500ml: about 13 x 27cm, 2600ml: about 14 x 33cm 8. Weight: 550ml: about 84g, 1500ml: about 180g, 2600ml: about 290g