Orthodontic Shaped Teat: The teat is designed with an orthodontic shape and a super soft zone, which mimics the shape of a mother's nipple during breastfeeding. This makes it easier for babies to accept the bottle and allows mothers to alternate between breast and bottle-feeding with ease. Temperature Control Indicator: The built-in Temperature Control indicator changes color from blue to white when the bottle's contents are too hot. This feature ensures that your baby's milk is always at a comfortable drinking temperature, minimizing the risk of burns or discomfort. Anti-Colic Vent: The NUK Anti-Colic Air System helps minimize infant colic by preventing the harmful swallowing of air during feeding. This innovative venting system reduces the likelihood of discomfort for babies and helps promote a more comfortable feeding experience. Wide Bottle Neck: The wide bottle neck allows for easy filling and cleaning, making maintenance a breeze for parents. BPA-Free and Durable: Each bottle is BPA-free, ensuring that it's safe for your baby to use. Additionally, the bottles are durable and made in Germany, meeting high-quality standards. Sealing Disc: The included sealing disc ensures leak-proof transportation, providing added convenience for parents on the go. Suitable for Combination Feeding: The extra wide lip support simulates breastfeeding as closely as possible, making these bottles suitable for combination feeding. Overall, the Nuk First Choice+ Temperature Control baby bottles offer a comprehensive solution for parents seeking safe, comfortable, and convenient feeding options for their babies.