This hydration innovation marries Yeti's chug-style cap with the simplicity, function, and power of magnets for a 100% leakproof, on-the-go solution. The MagDock Cap is smartly designed with a magnet docking station so you never lose your cap when you're downing your H20. And the customer-favorite narrow spout of our chug cap allows for faster drinking while keeping ice cubes at bay. That's too many wins to count. Bottle Magdock Cap is compatible with all Rambler bottles. Note! Do not use the Rambler® Bottle MagDockCap with carbonated beverages or for storage of food or perishables.