The Natural Response silicone teat in a pack of 4 from Avent imitates the feeling of the breast to facilitate the combination of breastfeeding and bottle feeding. The opening of the teats is designed so that they only release milk when your baby is actively feeding. This allows your baby to suck, swallow and breathe at their own pace - just like when breastfeeding. The particularly soft texture and wide design of the teat is reminiscent of the feeling of a mother's breast. The anti-colic system reduces the risk of your baby swallowing air when drinking and thus prevents colic and discomfort. The optimum feed flow depends on how quickly or slowly your baby feeds. A slow food flow is suitable for active, fast drinkers. A fast feed flow, on the other hand, is suitable for slow and constant drinkers. Teat level 1 has an extra small opening to ensure a controlled, slower food flow especially for newborns and is therefore suitable from birth. Age recommendation: from birth. Teat material: silicone. Sterilisable, boilable. Scope of delivery 4 Natural Response silicone teats - teat level 1.