Sip in Style! 🌟 Designed for 10mm straws, ensuring a snug fit with Stanley 30 & 40 oz tumblers. Hand washable and dishwasher safe, making maintenance a breeze for busy lifestyles. Dust and splash-proof, ideal for your adventures, keeping your drinks clean and secure. Crafted from high-quality, non-toxic silicone, these caps are built to last and safe for all users. Add a pop of personality to your tumbler while preventing spills and splashes. Cute designs 10pcs variety Reusable silicone The ALKNOT 10pcs Straw Cover Caps are designed specifically for Stanley 30 & 40 oz tumblers, featuring a snug fit for 10mm straws. Made from high-quality silicone, these reusable caps are durable, safe, and perfect for outdoor activities. With a variety of cute designs, they not only protect your drinks from dust and spills but also add a fun touch to your beverage experience.