Our sippy cup lids are made of high quality BPA free silicone and fit well over most cup sizes (2"- 3.15" Diameter). <br> They are easy to clean, dishwasher & boil safe. No need to carry bulky heavy bottles as our lids make most cups spill proof in minutes. <br> <br> Features：<br> Turns your cup into a sippy (cups not included).<br> Stretches over most cup sizes (2 - 3.15 inches diameter).<br> Make any cup spill-proof.<br> Recommended age 9 months+ <br> High-quality, food-grade silicone <br> BPA and phthalate-free material <br> Dishwasher safe <br> Foldable and stackable for easy storage <br> Practically any straw fits: Plastic, Metal or those Cute Paper Ones <br> Unique gift for adults, kids or potential “spillers” of any age<br> <br> Care and Cleaning<br> Wash thoroughly before initial use and after each use. Wash each piece separately.<br> Dishwasher-safe or hand wash in warm, soapy water. Do not microwave. Can be boiled or sterilized.<br> <br> Package Included:<br> 5 x Silicone Cup Lids (Cups NOT INCLUDED)<br> 3 x Silicone Drinking straws<br> 1 x Cleaning brush<br><br> Note: If you touch the lid once it's on, liquid will shoot out from the straw, because no air inside the cup and our lids air mouth is too small. If you press on the air month, the liquid will spill out from the straw too.<br> To solve it, you can choose to cut the air mouth a little large, but if you reverse the cup, the liquid will leak, it's one thing two sides, if you use this kind of silicone cup lids, any straws on it will meet this issues, if you mind, we are not advise you buy. <br> 365 * 24 hours customer service, if you are not satisfied with the product, please contact us!