Compatible with: ONLY applicable to 20 ounce glass cups of the YETI brand, and ONLY applies to glasses with a smooth inner wall. To avoid purchasing unsuitable lids, please confirm carefully before purchasing Durable: Our lid is made of crystal transparent plastic that is BPA-free, safe and non-toxic. Can be reused for many years Easy to Clean: The magnetic sliding cover design is easy to disassemble and clean Maintain Beverage Temperature: Our 20 ounce travel cup lid fits tightly against the cup, providing good sealing and preventing spillage or leakage After-sale：If you have any questions about our products, please feel free to contact us Magnetic Tumbler Lids for Yeti