NUK Nature Sense creates a natural drinking sensation, just like breastfeeding. The NUK Nature Sense Teat is modelled on a mother’s nipple down to the very last detail - with several tiny openings just like the milk ducts in a mother's breast for an even and natural flow. The shape of the teat also resembles the female nipple when breastfeeding for it adapts flexibly to the tongue and palate when the baby feeds. The material used is soft, giving that familiar feeling to your baby's lips and is ideal for breastfed babies that will take an occasional bottle; for mums who deserve a break, for dads who would like to feed their baby too or for when it is time to wean. The Nature Sense Teat is available with three different drinking holes (S, M and L). Depending on baby’s individual sucking strength, these different hole variants allow for an optimal drinking flow. Small is a slow flow ideal for breast milk, Medium is a regular flow an Large is a fast flow. Suitable for ages: 0-6 months (Small).