Fit for 10mm/0.39in Straws: This package includes 6pcs of Pink Mice Straw covers in different styles, designed to fit Stanley cup 30oz/40oz straws. Please note that these covers are too small for 12mm straws and too loose for 6-8mm straws. Be sure to confirm the size of your straw before purchasing the cover caps. Food Grade Material Silicone: Straw covers are made of premium food-grade silicone, no mess, and BPA. It is also dishwasher safe and hand-washed easily, making cleaning much easier. Anti-Spill Feature & Sealed Protection: Featuring a seal design, and elastic silicone material, this straw cover cap is dustproof, and spillproof, and can effectively keep your drinking cup clean. It allows you to conveniently carry your cup to various outdoor activities. Such as parties, walking, camping, and hiking. Fun and Cute: Straw cover cap for Stanley Cup with a cute and fashionable design, adding a touch of personality and style to your straw. And the uniqueness of the cap makes it easy to know which one is yours. These straw toppers make great presents for families or friends who enjoy a blend of utility and aesthetics in their drinkware. Package: 6 straw caps packaged in a clear box. If there are any defects or missing parts when you receive them, please reach us. 6PCS Straw Covers for Stanley Cup Tumbler 30 oz / 40 oz Leak Proof Straw Toppers 10mm Silicone Cute Straw Stopper Caps for Stanley Cup Accessories-Pink Mice