Twin pack standard 4-ounces (120ml) Dr. Brown's Natural Flow baby bottle with Level-One nipple.

The patented, innovative design of the Dr. Brown's Natural Flow provides the following health benefits:

• Unique internal vent eliminates the vacuum and air bubbles, to help reduce colic, spit-up, burping and gas
• By eliminating the negative pressure, it can help reduce build up of fluid in baby's ear
• Positive-pressure design mimics breastfeeding and is ideal for breast milk and formula alike