NaturalFeeling is the only bottle line that allows you to breastfeed your baby in a natural way, thanks to 3 different teats with specific shapes depending on the age of the baby. In fact, they change shape according to the baby's ability to suck: from the inclined teat for newborns to the rounded one for the first months to the elongated one ideal for older children.Inclined for newborns.Rounded for the first few months.Double anti-colic valve: Reduces the risk of swallowing air, a cause of colic, and promotes a serene.breastfeeding.Extra soft silicone and soft base.It simulates the mother's breast best and offers baby a natural feeling during feeding.