Generously sized for your longer pursuits, the 32 oz (946 ml) Lightweight Trail Series bottle is 25% lighter than the other Hydro Flask 32 oz (946 ml) bottles thanks to an innovative stainless steel design. Engineered to deliver the same cold refreshment you expect from Hydro Flask but without the weight, the Trail Series makes it easy to take your cold hydration as far as your spirit of adventure takes you. TempShieldThe unique double wall vacuum insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure. LightweightThis lightweight stainless bottle is 25% lighter than the 24 oz (710 ml) and 32 oz (946 ml) wide mouth bottles, and because it weighs less you can do more. Stainless Steel Construction18/8 pro-grade stainless steel walls are thinner to reduce weight while maintaining durability. Lightweight Flex CapThe Honeycomb insulated wide mouth cap with a flexible perforated strap and aluminum pivots cut weight in our leakproof design.