Made of food-grade silicone and pp materials, withstands temperatures from -104°F to 392°F Leak-proof with detachable silicone sealing ring, easy to clean with wide mouth bottle design Foldable design reduces volume by 50% for easy portability, includes carabiner for attaching to backpack Durable and reusable silicone construction, shatterproof and anti-vibration Contact us if any issues, we hope you have the best experience possible