*320ml capacity provides sufficient water for hiking, camping, climbing, running, and other sports*Made of BPA-free, food grade silicone, flexible, collapsible and reusable bottle perfect for outdoor activities*Cold and heat resistance, this product has excellent heat resistance and can withstand temperatures from -50 to 200°C*Lightweight, foldable and portable; takes up minimal space when collapsed; equipped with aluminum carabiner to attach to bags