The Philips Avent Natural Response Nipple Flow 4 is designed for babies 6 months and older. This wide and soft silicone nipple features a fast flow design to accommodate the growing needs of your little one. Made by Philips Avent, a trusted brand known for its anti-colic nipples, this unit is ideal for promoting natural feeding rhythms and reducing colic. With a unit quantity of 2, this product is a great choice for parents looking for a reliable and effective bottle nipple option for their baby.