The Flow System features a silicone nipple with a flexible diaphragm that supports natural sucking and prevents air intake. Its balance membrane valve adjusts to the baby’s sucking intensity, mimicking breastfeeding. The pre-formed flat nipple shape supports healthy oral development. Made from hygienic, soft silicone, it feels like a mother's breast. The bottle is easy to disassemble for cleaning, promotes motor nervous system stimulation, and is clinically tested and BPA-free. Approved by 96% of mothers.