Light, but mighty, the Hydro Flask 24 oz. Wide Mouth Lightweight w Flex Cap allows you to hydrate without weighing down your pack. The lightweight bottle is 25 lighter than traditional Hydro Flask 24 oz. Wide Mouth bottle thanks to an innovative stainless steel design. The 188 pro-grade stainless steel walls are thinner to reduce weight, yet the TempShieldtrade insulation still keeps beverages cold up to 24 hours and hot up to 12 hours while eliminating condensation on the bottle. The lightweight cap with a flexible perforated strap is leakproof and lets you easily carry the bottle wherever you go to stay hydrated. Plus, it is BPA-Free and Phthalate-Free.