Seamless Transition Nursh Curve offers a gradual transition from nipple to base for a deeper more comfortable latch as little ones move between breastfeeding and baby bottles Latch Line Indicator The latch line allows you to see that your babys mouth is in the best position to get the perfect latch Safety of Silicone Designed to work with all Nursh baby and newborn bottles the only thing your babys milk touches is the platinum foodsafe silicone of the nipple and pouch made without BPA or PVC Easy to Clean These baby nipples for bottles have a dishwashersafe design that makes cleaning up after feeding quick and easy nipples are safe for boiling and the sterilizer too Choose the Flow Discover all four flow rate options to adjust to your babys changing needs as they grow whether they need preemie slow flow nipples medium flow nipples or fast flow nipples