[Health and Safety Material] The folding water bottle is made of food-grade silicone (bottle body) and pp (bottle cap) materialsour materials have passed the US Food Safety Certification (FDA) free of BPA and other harmful substances. Safety for a wide range of temperature: -104F to 392F. In order to avoid burning, we recommend you don't to use the bottle for liquid temperatures higher than 140F. [Leak-Proof and Easy-to-Clean] The collapsible water bottle has a silicone sealing ring to prevent water from splashing out. The bottle mouth is detachable, wide neck detachable design makes the bottle easy to clean. Put ice and lemon in it, and the narrow mouth prevents leakage and wetting when drinking water. [Easy to Be Carry] Foldable design, the volume of this foldable silicone bottle is reduced by 50% after folding, leaving only 4.88 inches (height), which can be adjusted according your needs. Comes with a lobster clasp, makes it is easy to carry or attach to the backpack perfect for gyms, workout, office, and outdoor recreations. [Durable and Reusable] This silicone foldable water bottle can be used reusable, it also anti-vibration and explosion-proof, you don't have to worry about it will be broken or scratched.