They are the best replacement for fragile glassware. Despite their flexibility, the canisters are absolutely leak-proof and tight. The foldable water bottle is made of environmentally friendly and safe material, odorless. The small water bag is transparent and soft, does not leak and allows you to reuse it. The water bag is suitable for temperatures between -20 and +50. When three-quarters full, the liquid can also be used frozen as a cooling compress. 1. Quantity: You will receive three sports water bottles. The water bottle is available in 4 colors to share with your partner during a hike. 2.Features: Each collapsible water bottle is equipped with a clip that allows the water bottle to be attached to a bag, bike or belt, making the entire trip easier to carry and less likely to be lost. The water bottle can be easily folded over the cap. The hat has a hard closure and opens easily. The hat allows you to stay active without worrying about spills or leaks. 3.Use: Simply unscrew the super cap from the bottle to reveal the wide opening. Perfect for filling and cleaning your bottles. Can be cooled in the refrigerator, not due to frost deformation damage, can be used as an ice pack, cold compress. Be careful not to use hot water. 4. Usage tips: Inject 1/2 of the water into the water bag before freezing, no more than 2/3 of the water (to prevent the water from expanding when freezing and breaking the water bag). Fill after freezing Fill the water bag with normal temperature water so that you can drink frozen water.