Our straw lids are made from food grade silicone, BPA free, no unpleasant smell, and non-toxic.They not only serve as decorative accessories but also encourage children to drink more water.Our straw topper not only prevents dust and spittle from contaminating your straw and cup but also keeps mosquitoes out of your water. The dustproof and splashproof design makes it ideal for outdoor activities. Enjoy a hygienic drinking experience wherever you go.It perfectly matches for 10mm types of straws, good sealing effect. And this will be a very practical and durable gift for your friends or families, I hope you can have fun with it! One color or full color imprint are available.