Made of foodgrade silicone and pp materials withstands temperatures from 104F to 392F Leakproof 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 antivibration Contact us if any issues we hope you have the best experience possible