2 Replacement Lids for Stainless Steel Tumbler Travel Cups - Fits Yeti Ramblers and More with 3.7-3.74" ID (Clear) (30 oz) Excellent Compatibility: Designed to replace lids for 30-ounce stainless steel insulated mugs with an inner diameter of about 372 inches; not suitable for RTIC flat bottom cups Measure the inner and outer diameters of your cup and refer to our fourth and fifth images to ensure proper fit Splash-Proof Design: Features a silicone gasket on the top hole cover to prevent splashes and large spills, with an air hole at the top of the slider to help reduce collisions Leak Prevention: While the lid is designed to minimize leaks, it cannot be guaranteed to be 100% leak-proof. Please review the safeguards provided before purchasing Durable Construction: Made from high-quality raw materials, the lid is BPA-free, built for long-term use, and easy to clean, including being dishwasher safe User-Friendly: Ensures a secure fit and functional design that enhances your drinking experience by keeping beverages contained and minimizing mess