Transition To Bottle Feeding with Confidence Using The Philips Avent Natural Response Teats for Babies Aged 3+ Months. These Flow 4 Teats, Coming In A Twin Pack, Are Expertly Designed To Provide A Comfortable and Natural Feeding Experience, Keeping Your Baby Happy and Content During Each Feed. The Philips Avent Scy964/02 Natural Response Teats Are Perfect for Infants 3 Months and Older Who Are Developing Stronger Feeding Patterns. Ideal for Parents Looking To Combine Breast and Bottle Feeding Without Causing Nipple Confusion, These Teats Provide The Right Pace for A Natural Feed, Just Like Mom’S Breast. With These Teats, You Can Rest Assured That Bottle Feeding Will Be A Bonding Experience, Filled with Comfort and Joy for Both You and Your Baby. Sterilize The Parts By Boiling Them In Water for Five Minutes or Using A Philips Avent Sterilizer.