Designed for older babies, the Dr. Brown's Natural Flow Options+ Level 3 Wide-Neck Nipple is a medium-fast flow nipple. The shape of this nipple encourages proper latching and was designed with the support of medical professionals. This nipple is made of soft silicone to offer a more comfortable feeding experience and help to avoid nipple confusion. The suggested age range for the Level 3 nipple is 6 months+ but baby's preferred flow rate may vary. Fits Dr. Brown's Options+ Wide-Neck bottles. Dishwasher (top rack) and sterilizer safe. BPA free.