This 20 oz. insulated cup lid is a universal model that fits multiple YETI insulated cups and mugs, including 20 oz. insulated cups, 10 oz. short cups/mugs, and Rambler 25 oz. straw cups. It does not fit the Rambler series water bottles, water jugs, or travel cups with strong lids. The lid features a sliding magnetic switch design, preventing spills and leaks. The magnetic sliding lid is easy to open and close, making it convenient for travel use. The overall design is transparent, allowing you to directly see the remaining amount of the drink without having to remove the lid. The lid is made of food-grade BPA-free material to ensure the safety of the drink. It also uses a sturdy double-layer sealing design, which is durable and can withstand various daily usage scenarios such as commuting and outdoor activities. It is a practical replacement accessory for YETI cups. Material: Plastic.