The latest in hydration innovation, the YETI Magdock Cap Accessory marries the chug-style spout with the simplicity, function, and power of magnets. Translation: You get a 100% leakproof, on-the-go solution for easy, maximized hydration. The YETI Magdock Cap Accessory has an intentional design with a magnet docking station so you never lose your cap when you're downing your H20. The customer-favorite narrow spout of this YETI cap allows faster drinking while keeping ice cubes at bay. All of this results in a quick-access, worry-free bottle cap that will fit all Rambler Bottle sizes.Manufacturer model #: 21071300216. Chug-style top with magnet dock Magnet cap Cap will fit all Rambler Bottle sizes Dishwasher-safe 100% leakproof