Made from 100% sustainable materials (mass balance method)* \ \ \ from raw materials to production with green electricity, it is environmentally friendly and has the smallest possible carbon footprint \ anti-colic air system: to prevent air swallowing – for a happy tummy \ natural feeling when feeding: nipple with extra wide base and soft tip with multiple tiny holes – a familiar feeling similar to the mother's breast \ \ \ size s with 3 holes (for slow flow rate), size m with 6 holes (for medium flow rate), size l with 9 holes (for fast flow rate), BPA-free, compatible with all nuk for nature bottles and all nuk nature sense accessories \ \ \ \ nuk for nature nipple, sustainable silicone nipple similar to the mother's breast, BPA-free a (bpa), 2 pieces \ \ size s with 3 holes (for slow flow rate) \ msize m with 6 holes (for medium flow rate) \ msize l with 9 holes (for fast flow rate) \ \ nuk for nature nipple – it’s never too early for sustainability \ \ because what supports sustainability is naturally better. that’s why the nuk for nature nipple is made from 100% sustainable materials (mass balance process). the soft nipple is made from sustainable silicone.* for all nuk for nature products we use 100% recyclable paper packaging, certified according to the fsc sustainable forest management standard. and to reduce the carbon footprint even further, everything from the raw materials to the production with green electricity is optimised to be climate-friendly. \ \ a natural feeling is essential when feeding. It is therefore important that the nuk for nature bottle gives the baby the same feeling when feeding as when breastfeeding. This is confirmed by 98% of mothers.** This unique natural feeling is due to the nipple that is designed according to the mother's nipple. down to the last detail. The nuk for nature nipple has a particularly wide and flexible base and multiple tiny holes – like the milk glands of the mother's breast. Thanks to the nuk anti-colic system, both babies and parents are calm. All these elements allow for an optimal and even better natural flow. \ \ for these reasons, and for many others, the nuk for nature bottle is recommended by midwives and pediatricians.** \ \ *these sustainable materials come from 100% natural raw materials. are compatible with the mass balance approach and are certified according to the redcert² standard (silicone). \ \ **independent market research in Germany, 2016. \ \ the right nipple for every baby \ \ the nipple is available in three different hole numbers (s, m and l). depending on the strength with which each baby performs the sucking movement, 3 hole variations allow for the optimal flow. \ \ nuk bottles comply with the European safety standard en 14350. \