Keep splashes at bay and debris out with the Yeti Rambler MagSlider Medium magnetic lid for insulated bottle. Find the right size lid for your Rambler insulated bottle. For each size, the smooth magnet offers a reliable sliding mechanism. Plus, the magnet is simple to remove for easier, more thorough cleaning. While the magnet on the included MagSlider lid adds an additional barrier of protection for keeping drinks contained and preventing heat or cold from escaping, note that this magnet component is not leakproof and will not prevent spills.