Upgrade your hydration game with our universal narrow mouth replacement lids, designed to fit seamlessly with any of our narrow mouth flasks. Compatibility: Only narrow mouth flasks: 750ml Old School Please note: Our Straw Lids are not leak-proof, so avoid packing them inside your bag. For leakproof options, use the original screw lid provided with our flasks, offering an airtight seal for worry-free transportation. Carry your flask securely and enjoy leak-free hydration wherever your adventures take you.
