Essential Stanley Cup Accessories - These straw covers with a diameter of 10mm fit most 0.4 inch diameter straws are compatible with Stanley 30/40 OZ tumblers. Whether you're at home or out for work or sport, these straw covers caps will be a elegant and practical stanley cup accessories for you Dust Proof Straw Cover for Tumblers - With these cute mushroom appearance designed stanley cup straw topper, it can prevents the straw from entering by dust and spittle in the air, and also prevents mosquitoes from entering the water cup, keeps the straw and cup hygienic and clean also make your tumblers more stylish and cute Food Grade Silicone Straw Cap - These straw covers cap for tumblers which are made of food grade silicone, is durable and reusable BPA free, non-toxic and odorless. Easy to clean by hand or just toss in dishwasher. Perfect for outdoor activities. Plus, the cute look can help encouraging children to drink more water Portable & Easy to Use - Package includes 6 pack of straw cover cap, convenient for you to replace regularly within 1-2 months. They can be directly fixed on the straw and easy to put on and take off when using. These straw toppers are also small and easy to carry, making it perfect for outdoor activities like walking, camping, and hiking Perfect Gift & Service Guarantee - When you walking on the street, camping, hiking or doing other activities with your stanley cups , these stanley straw cover would be as a boon. Also make great gifts for friends and family.If you have any questions, please don't hesitate to contact us. We are committed to resolving any issues within 24 hours Silicone Straw Cover Straw Toppers for Stanley Cups 30 40 oz Straw Cover Cap for Tumblers Reusable Dust Proof-6PCS 10mm Feature: Essential Cup Accessories: Whether you're at home or out for work or sport, these straw covers caps will be a elegant and practical stanley cup accessories for you. Creative Appearance Design: Cute mushroom appearance designed cup straw topper make your tumblers more stylish and cute. Also can help encouraging children to drink more water. Keep Your Straw Clean: Prevents the straw from entering by dust and spittle in the air, and also prevents mosquitoes from entering the water cup, keeps the straw and cup hygienic and clean. Reusable and Easy to Clean: Made of food grade silicone, these straw lid are durable, safe and non-toxic, reusable, hand washable and dishwasher safe. Perfect For: When you walking on the street, camping, hiking or doing other activities with your stanley cups , these stanley straw cover would be as a boon. Ideal Gift: A beautiful gifts to relatives and friends. Specifications: Compatible With: Stanley 30/40 OZ tumbler straw and most straws in diameter 0.4 inch(10mm) Product Diameter: 0.4 inch(10mm) Material: Food grade silicone Package Include: 6 Packs silicone straw covers NOTE: Straw and cup are NOT INCLUDED.