Revolutionary teat developed with breastfeeding experts and mums to mimic the breastu0026#39;s natural flex, stretch and movement, closer to nature bottles makes feeding time easier for mum and babynThe slow flow nipple with a super sensitive valve eliminates excessive air flow, so little ones ingest more milk and less airnThe soft silicone nipple feels like skin, and gently flexes during feeding to mimic natural breastfeeding actionnThe compact shape of closer to nature bottles allows baby to feed in a natural position and to be closer to mom or dadnAll the tommee tippee closer to nature bottles are bpa-free for total reassurancen