[PERFECT REPLACEMENT-This magnetic cup lid is designed to fit the YETI 30 oz Tumbler 14 oz Mug26 oz Cup30 oz Tumbler and 35 oz Straw Mug. (Please note: This lid is not compatible with Rambler bottles/jugs or travel mugs with the stronghold lid.) "SPILL-PROOF AND INSULATION- Black silicone o-ring tightly the cup to prevent leakage. Thick lid makes the beverage more insulated cooler or warmer for the most of the day. It prevents spills but not meant can be stored in bagits great to seal from splashes if you have it in your car." STYLISH AND PRACTICAL DESIGN-The tumbler replacement lid features a sturdy double-sealed design and two strong magnets for smooth and secure opening and closing. Will not touch the nose when drinking. Slider can be removed easy to wash. SAFE TO USE-Made of high-quality shatter-resistant and BPA-free material.Even repeated use for yearsit still stay crystal clear. EASY TO CLEAN-Magnets makes for easy cleaning - pop the MagSlider off rinse dry and return it to the Lid. Our replacement mug lid are cost-effective and function just as the original did. PlusYou can be sure to use the dishwasher to clean but avoid using in microwave.]