SafetySafe to Use Our foldable water bottle is made of food-grade silicone, BPA free ( No Phthalates, No Bisphenol-A, and Non-Toxic Plastic). With Certificated food grade Silicone material.Eco-Friendly.Certificates: CE/LFGB/RoHS/BAP Free. LEAK-PROOF AND EASY-TO-CLEANThe 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. Cold and HeatHeat Resistant Temperture: -50C - 220C High Temperature Resistance Without Deformation. Boiling water will not cause the cup body tp deform, No Odor. Lightweight and convenient21Oz sport water bottle Drop-resistant and Wear-resistant. Not easy to deform, Not easy to break. Collapsible for light travel Perfect for Sports and HikingIt makes ideal travel gifts for those sharing a healthy and sustainable lifestyle on backpacking, cycling, camping, hiking, exercise, trips, school, daily use, etc