1. Magnetic Slider: The sliding piece can be easily removed for cleaning, and the switch is controlled by the principle of magnetism. Use the principle of magnetism to control the switch, the sliding piece can be removed for easy cleaning，You can safely use the dishwasher to clean it, but avoid using it in the microwave. 2. Compatible/Replacement Brands: This tumbler lid is specially designed for Yeti Rambler, Old Style RTIC (Not compatible with New Style RTIC), Ozark Trail, and most other tumblers or cups. This lid will help with accidental tips and spills but not means no leaks if inverted for a long time or put it in your bag.It is great to seal from splashes if you are walking around with it or have it in your car but not meant to be stored in a bag or lie it down. 3. Magnetic slider opens and closes smoothly, and the drinking hole is convenient for sipping directly or using a straw. No touching your nose when drinking. Slider is removable and easy to clean. Enjoy your favorite hot or cold drink! The clear lid helps you know how much coffee you have left without having to remove the lid. 4. The black magnetic switch can open and close for sipping directly or for a normal straw. The magnet covering the sip hole can be easily removed for easy cleaning. Put it under running water and watch it almost clean itself, unlike other solid spill-proof lids. Come with a black silicone o-ring around the base, which helps cover the cup tightly.