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 18/8 pro-grade stainless steel walls are thinner to reduce weight, yet the TempShield™ 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.