The Dr. Brown's Glass Options+ Anti-Colic Baby Bottle 4oz designed for newborns and infants. Made of glass with a narrow neck, these bottles feature anti-colic nipples made of silicone, providing a comfortable feeding experience for babies. With a capacity of 4oz (125ml), these bottles are dishwasher safe for easy cleaning. The bottles come in a clear color and are suitable for babies from 0 months old. Made in the United States by the trusted brand Dr. Brown's, these bottles are a reliable choice for parents looking for a high-quality feeding solution for their little ones.