High Quality Material: Our Straw Cover Caps are made of high-quality silicone, ensuring durability and reusability. They can be easily hand-washed and are built to last. Compatible: Designed with a diameter of 0.4 inches (10mm), these caps are specifically compatible with Stanley 30 and 40 OZ tumblers. They provide an excellent seal, preventing any spills or leaks. Dust-proof and Hygienic: With our Flower Silicone Straw Cover Caps, you can keep your straws clean and free from dust. No more worries about dirty straws when drinking your favorite beverages. Widly Use: Our Straw Topper Caps are perfect for use in various settings, including school, office, and home. They are a convenient and hygienic solution for keeping your straws protected. Thoughtful Gift: Each pack contains 3 adorable flower-shaped silicone straw covers. They make a unique and thoughtful gift for your friends or family, showcasing your attention to detail and care. Clakioom Flower Straw Cover Cap for Stanley Cup, 3Pcs Straw Toppers Accessories Compatible with Pink Stanley Cup 40 Oz Tumbler, for Home and Party Decor (Pink)