The YETI Rambler(R) Bottle MagDock Cap not only provides a 100% leak proof closure but also has a Magnet docking station so you can store the cap in between sips and you'll always know where it is. FEATURES: Chug-style magnet cap Magnet docking station secures cap so you don't lose it 100% Leak proof Dishwasher safe for easy cleaning Compatible with all YETI Rambler Bottles