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**EXCELLENT COMPATIBILITY:** Replacement lids for 30/40 oz tumblers are designed to fit cups with a mouth diameter of 3.75 inches. To ensure you select the right lid, please measure both the inner and outer diameters of your tumbler before making a purchase.
**HIGH-QUALITY MATERIAL:** DOMICARE tumbler lids are crafted from premium materials for durability and are free from BPA.
**100% LEAK-PROOF:** Featuring a sliding cover mechanism, this lid provides a secure seal, allowing you to carry your beverage without the fear of spills.
**STRAW FRIENDLY:** The lid includes a specially designed central opening for straws. You can easily slide the lid open to drink or use a straw for convenience.
**EASY TO CLEAN:** The lid's seal is removable, allowing for separate cleaning from the 30/40 oz tumbler lid, ensuring a thorough cleaning to prevent the accumulation of dirt and grime.