6-10mm Compatible Straw Covers: Compatible with Stanley tumbler cup straw and all straws in diameter 0.24-0.4 inch(6-10mm).The perfect gift for friends and family. Food Grade Material: Made of silicone, These silicone straw covers are durable, reusable, and can be cleaned by hand or in the dishwasher. Not only can it be decorated but also can increase children's habit of drinking more water. It is airtight and sealed, dustproof and splashproof, Especially suitable for outdoor activities. Stanley straw cover: This straw topper not only looks cute, but is also practical.It can effectively block dust and other foreign objects from entering, a straw stopper that can be used permanently without harming your body, very cute, you deserve to have it. Latest Cute Design:Lifelike,light and small,You can carry and use it anywhere, Suitable for various outdoor activities, Such as walking on the street, Camping, Hiking or other activities, You can also give them as beautiful gifts to relatives and friends. Great Stanley Cup Accessories: Great novel gifts! Great for your friends or family.