1、Leakage Prevention: This water bag has excellent sealing performance. There is a gasket in the cover, which can prevent water leakage absolutely. Even if you squeeze hard, it will not leak. 2、Dust Proof: The mouthpiece is equipped with a special dust cover to guard the cleanness of the mouthpiece. Our water bags are suitable for drinking water at room temperature, not for drinks and hot water. 3、PVC Soft Water Pipe: Our water bags come with a premium PVC water pipe that has length of 100cm. The PVC water pipe will not be deformed or aged. 4、Practical Features: The water bag body is translucent and printed with a volume scale. Foldable collection, easy to carry. The inner diameter of the water inlet is 100mm, which can easily put ice cubes into the bag. You can also put your hand into the bag to clean the inside of the water bag, and you can easily grasp the bag and turn it over to thoroughly clean the water bag. In special cases, it can also be loaded with mobile phones and other valuables. 5、For Outdoor Activities: The water bag should be used in various outdoor activities, and is suitable for use in backpacks. When exercising, you cannot drink freely at one time, because drinking a large amount of water in a moment can easily cause a huge burden on the heart in a moment. Item Type: Water Bag Material: Bag Body (Food Grade TPU)+ Nozzle (Food Grade Silica Gel)+ Drinking Tube (Food Grade PVC) Water Pipe: 100cm/39.37in (including nozzle) Thickness of Water Bag Film: Single layer 0.4mm / 0.02in Structure: One Piece Molding 1 x Water Bag 1 x Water Pipe