Access your Rambler Bottle on the go without misplacing your cap. This hydration innovation marries the 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 the Chug Cap allows for faster drinking while keeping ice cubes at bay. The MagDock Cap is compatible with many Rambler Bottles. Do not use with Rambler Jr. 12 oz. Kids Bottle or Rambler 46 oz. Bottle.