Main product description Pacifiers are designed exclusively for Dr.Browns Options+ (Narrow) narrow bottles. These teats may not fit properly on other bottles and using them to feed your baby may cause difficulties. Teats are available for Dr.Brown narrow bottles (narrow) with 6 flow levels: Preemie - for preemies stage 1 - for newborns stage 2 - for babies from 3 months stage 3 - for babies from 6 months stage 4 - for babies from 9 months Y-cut - pacifier with a Y cut for feeding babies from 9 months to months. It allows a faster flow of food with higher density Stage 4 - feeding babies from the age of 9 months When the supply of milk increases and feeding from a stage 3 pacifier takes longer, many parents decide to switch to a stage 4 pacifier. This stage is suitable if the baby takes food without interruption for a longer period and uses a larger amount of breast and bottle. Consider level 4 for your baby if hes finger-feeding, drinking from a sippy cup, or if his pediatrician has recommended thickening his milk. The pacifier is made of high-quality, super soft, BPA-free silicone. Warning: Feeding pacifiers are not intended to calm or soothe babies.