Avent Teats Natural 2 Teats Slow Flow 1 Month + Philips Avent Natural teats are exclusively for bottles from the same range, Avent Natural offers a slow flow that is ideal for infants aged 1 month and over and for thin milks. They have also been designed specifically to promote a smoother alternation between breast and bottle. Thanks to their anatomical and wide shape, Philips Avent Natural teats tend to imitate the mother's breast and thus limit the infant's discomfort. Made of soft silicone, they have cells that prevent them from being crushed while giving them great flexibility. They also have a valve system that reduces the absorption of air by the baby's stomach, a potential source of colic. Despite their slow flow, Philips Avent Natural teats offer a continuous flow that does not cause frustration during breastfeeding.