- Perfect Compatibility: This magnetic cup lid is specifically designed to fit YETI 30oz Tumblers, 14oz Mugs, 26oz Cups, 30oz Tumblers, and 35oz Sippy Cups. (Note: Not compatible with Rambler Bottles or Travel Mugs with Strong Lids.) - Leak-Proof and Insulated: The black silicone O-ring forms a tight seal around the cup, effectively preventing leaks. The robust lid enhances insulation, keeping your beverages cooler or warmer for hours. While it prevents spills, it is not intended for bag storage; however, it effectively seals to prevent splashes when left in a car. - User-Friendly Design: The replacement lid features a reliable double seal and two strong magnets for easy opening and closing without the risk of bumping your nose while drinking. The removable slider allows for effortless cleaning. - Durable and Safe Materials: Constructed from high-quality, shatter-resistant, and BPA-free materials, this lid remains crystal clear even after years of use. - Versatile Use Cases: - Ideal for outdoor activities like camping or hiking, where spill prevention is crucial. - Perfect for everyday use at home or in the office, ensuring your drinks stay at the right temperature. - A reliable choice for road trips or long drives, keeping your beverages secure and splash-free. This magnetic cup lid combines functionality, safety, and style, making it an essential accessory for your YETI drinkware.