Product: Pack of 2 Replacement Sliding Lids for 30 oz Tumbler Key specifications and fit diameter: 9.10 inches Bottom diameter: 3.74 inches Measurement tolerance: approximately ±0.02 inches due to measuring methods Compatibility: Designed to only 30 oz tumbler lids that match the above dimensions. Please measure your original lid before to ensure proper fit. Refer to our measurement video for guidance. Why you need this lid Spillresistant: The sliding, sealed design reduces spills and splashes so your drink stays in the cup when you're moving or driving. Versatile drinking options: Sliding opening lets you drink directly or use a straw—push the slider gently to switch modes. Convenient care: Dishwashersafe for easy cleaning. Note: prolonged contact with dark liquids (coffee, tea) may cause stains that can be difficult to remove. What makes it stand out Pack of 2: Two identical replacement lids so you have a spare or a second lid for another cup. Secure fit for travel: Designed to seat snugly on 30 oz tumblers with matching dimensions to keep liquids contained during daily activities. Nosefriendly design: The slider prevents the lid from bumping your nose while drinking. Performance and use notes Slide the opening smoothly to open or close; it stays in place while you drink. Safe for dishwasher cleaning; hand washing recommended for stubborn stains. Avoid longterm exposure to darkcolored beverages to reduce the chance of permanent staining. Practical use scenarios Commuting and driving: Use the sealed lid in your car cup holder to reduce spills during sudden stops or sharp turns. Office and desk use: Keep your hot or cold drinks covered to minimize spills on paperwork or electronics. Outdoor activities and travel: Bring a covered tumbler on hikes, picnics, or errands to protect your drink from dust and accidental tipping. Important reminder This lid will only lids that match the stated and bottom diameters. To avoid buying the wrong size, measure your current lid and compare it to these dimensions before ordering. Refer to our measurement video if you need help. Pack includes two (2) replacement sliding lids for 30 oz tumblers with the dimensions listed above.