These Philips Avent Natural Response Teats, with a Flow 4 setting, are crafted to support your baby's natural feeding rhythm. The innovative design allows milk to flow only when your baby actively drinks, mimicking the breast for comfortable and controlled feeding. Suitable for babies 3 months and up, this 2-pack ensures you always have a clean, ready-to-use nipple for your Avent Natural feeding bottles. Made from soft, flexible silicone, they are designed for easy latch-on and a seamless transition between breast and bottle.