Upgrade your wide mouth bottle with our leakproof Flex Sip Lid for on-the-go sipping without spills. This lid is compatible with Hydro Flask's wide mouth bottles (20 oz, 32 oz, 40 oz, 64 oz). It features a leakproof design when closed, ensuring your beverage stays securely inside. Made from BPA-free materials for your safety, the lid is also dishwasher safe for easy cleaning. Hydro Flask offers a lifetime warranty against manufacturer defects, standing behind their durable and robust materials and high standards.