- Transparent Cup Cover Set: This set includes one replacement lid designed for 20 oz tumblers. The lid has an inner diameter of approximately 3.15 inches. Please verify the size before purchasing, as it is not suitable for 20 oz skinny tumblers. Product size details can be found in the attached image. - Safe Material: Crafted from high-quality, BPA-free plastic, our tumbler lid offers excellent transparency. It is lightweight yet durable, making it ideal for everyday use and dishwasher safe. - Splash Proof Design: The lid features advanced double-sealing technology to minimize spills, especially when transporting hot beverages. Its airtight design helps maintain your drink's temperature for longer periods. Note that this lid is not guaranteed to be leak-proof. Please refer to the provided precautions before purchasing. The hole cover accommodates straws with a diameter of approximately 0.8 mm. - User-Friendly Functionality: Designed with a sliding button, this replacement lid allows for one-handed operation, making it convenient to open and close. Ideal for various situations, it serves as a practical accessory for on-the-go lifestyles. Practical Use Scenarios: 1. Perfect for commuting: Keep your coffee secure while driving without worrying about spills. 2. Ideal for outdoor activities: Take your favorite beverages on picnics or hikes without the risk of leakage. 3. Great for workouts: Hydrate easily at the gym with a lid that allows for smooth sipping and straw use. Choose our replacement tumbler lid for a reliable, functional, and safe solution to enhance your drinking experience.