[ Food Grade Material ] - These straw caps are made of food grade silicone, which is safe, durable, reusable, and easy to clean. Sealed, dustproof, splash proof, very suitable for daily and outdoor activities. [ Fashionable Design ] - The design of the straw cover is inspired by the singer's shape design, fashionable, cool and various styles, which is the first choice for music fans. [ Perfectly Compatible ] - This straw cover is specially designed for stanley cup straws. You don't have to worry about the wrong size, fits most 0.4" (10mm) diameter straws. Compatible with Stanley 30/43 OZ tumblers. [ Easy to Carry ] -This straw lid set is small and easy to carry, perfect for daily and car use, outdoor activities such as walking, camping and hiking. [ Little Tips ] -If you find that the letters are printed backwards, just tear off the protective film on the surface, Thank you! The silicone straw covers for tumblers cup, also fit pencil topper decoations.