Keep splashes at bay and debris out with the YETI Rambler® MagSlider™ Lid — individually sized for YETI Mugs, Tumblers, and Lowballs. For each size, the smooth magnet offers a reliable sliding mechanism. Plus, the magnet is simple to remove for easier, more thorough cleaning, so it can stay in its prime, and far outlast any other slider lids out there. This dishwasher-safe lid also adds a barrier of protection to keep any drink you’re craving contained while helping prevent heat or cold from escaping. Please note: the MagSlider Lid is not leakproof and will not prevent spills YRAM20LID fits 10 oz. Mug, 16 oz. Pint, 20 oz. Tumblers and 25 oz. Straw Mugs. YRAM30LID fits 14 oz. Mugs, 26 oz. Cups, 30 oz. Tumblers and 35 oz. Straw Mugs.