Tommee Tippee Closer to Nature Vari-Flow Feeding Nipple 2 Pack 423960 is designed to adapt to your baby's feeding pace, offering customizable milk flow. This nipple features a unique Y-cut that allows the baby to control the flow, making it suitable for various stages as they grow. Its soft, breast-like shape encourages a natural latch, and the anti-colic valve helps reduce air intake. Made from safe silicone, these nipples are easy to clean and replace, ensuring hygienic and responsive feeds.