Includes adapter cap, Avent spout and dome lid. Every new parent wants to make sure their baby"s environment is as healthy as possible. Klean Kanteen can help with that. We designed a special adapter that works with Avent"s patented sippy cup spout. It"s BPA-free polypropylene and integrates seamlessly with our 12oz Klean Kanteen Classic bottle. The bottle is made from 18/8, food-grade stainless steel that"s totally free of BPA and other toxins. Because stainless steel itself is safe, we don"t need to coat the inside of the bottle with a plastic or epoxy lining, which is one of the main differences between a stainless steel Klean Kanteen and aluminum bottles. Food-grade stainless steel is used in the brewing, food and winemaking industries too. It"s the material of choice because it doesn"t retain or impart flavors. So apple juice tastes like apple juice, nothing more, nothing less. You can rest assured that your child"s Kid Kanteen Sippy is totally safe and flavor-free. Our Sippy is designed for small hands too, so it"s easy to hold. And the large-mouth makes cleaning as simple as a quick scrub with soap and water or a trip through the dishwasher. Relax knowing your child is drinking from a completely healthy and hygienic Sippy, and put your energy into the important stuff like bedtime stories and teaching junior to say ômamaö and ôdadaö.