The uniquely designed Dr. Brown's Natural Flow Options+ Y-Cut Wide Neck Nipple is a fast flow teat designed for use with thicker liquids. Suggested age range for the Y Cut Pacifier is 9 months and up, but baby's preferred flow rate may vary. Breast-like shape encourages a good latch for a more natural bottle-feeding experience. p> Designed in collaboration with medical professionals, the properly contoured breast shape and high-quality soft silicone provide a more comfortable feeding experience and help prevent nipple confusion. < /span>Perfect for switching from breast to bottle and vice versa! With the anti-colic internal ventilation system, the Y Cut Wide-Neck pacifier gives baby vacuum-free feeding that is clinically proven to reduce colic, reduce burping and wind, preserve nutrients and facilitate digestion for a good night's sleep. Although our bottle works best with the vent system, it's good to have options as baby's feeding develops. Simply remove the vent and the feeding experience is similar to most vented bottles. Designed to fit Dr Brown's Options+ Wide Neck Baby Bottles only. Dishwasher (top rack) and sterilizer safe. BPA-free.