Philips Avent Classic Bottles Nipple is made from thick, ultra-soft silicone material. The nipple has similar elasticity to that of a mother's actual breast for the baby to feel comfortable and makes less fuss. | Uses: It mimics the natural nipple of a mother to help feed babies and make them less fussy | Product Specifications and Features: Easy latch on due to the unique valve on the nipple Clinically proven to reduce fussing significantly Unique anti-colic system Minimum age: 2 months, maximum age 6 months BPA-free nipple module Material: silicone Different flow rate nipples available Compatible with Classic feeding bottle | Directions For Use: Use as directed on the label | Safety Information: Read the label carefully before use Store in a cool and dry place, away from sunlight Keep out of reach of children For external use only