OrganicKidz Peristalitic Vented Silicone Nipples 

This organicKidz More Like Mom Peristaltic Vented Silicone Nipples for Stainless Steel Baby Bottles allows baby to make a seamless transition from breast to bottle. The design of this nipple closely resembles Mom, and stretches and flexes to create a good seal as baby sucks, which reduces air intake and its associated discomfort.

The natural feeding action means baby will latch longer: the super supple silicone allows baby's mouth and tongue to move in a natural motion and fits baby's mouth perfectly. Two per package. Available in slow flow, medium flow, and fast flow for narrow or wide neck bottles.