Function : 1. Use durable and impact-resistant plastic so you don't have to worry about a collision while wearing it. 2. Made of environmentally friendly non-toxic materials, reusable, safety and long service life. 3. Equipped with a mouth guard to protect the mouthpiece from dust and damage. 4 . When filled with water, it stands upright like a water bottle which is light and easy to carry. 5 . Can be folded, rolled up, flattened or attached to a backpack, it does not take up space, it is easy to store. Specification: Item Type: Silicone Water Bottle Material: TPU PP silicone; Blue color Expand Size: Approx. 26 x 10.5 cm / 10.2 x 4.1 inch Fold Size: Approx. 8.5 x 10.5 cm / 3.3 x 4.1 inches Weight: Approx. 38.0 g / 1.3 oz Capacity: 500 ml Package List: 1 x silicone water bottle note : 1. Before using a new bottle for the first time, it is recommended to use household detergent or other cleaning agents to mix with about 30 degrees warm water to clean it before use, which can effectively remove the material smell and dust remaining in the production process. 2. Water outlet method: direct drinking 3. Regardless of whether it can be filled with boiling water: not boiled, the water temperature should not exceed 40