The YETI Rambler Bottle MagDock Cap combines a 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 youre downing your favorite drink. And the customer-favorite narrow spout of this chug cap allows for faster drinking while keeping ice cubes at bay.