Dr. Brown's bottles feature a patented internal vent system that eliminates the vacuum and air bubbles to help reduce colic, spit-up, burping and gas. The positive pressure design allows babies to feed comfortably, because the vent system eliminates the air bubbles and vacuum. Helps maintain vitamins C, A & E plus lipids. Easy to clean, dishwasher safe, BPA free.

• Clinically proven to reduce colic 
• Decreases spit-up, burping, and gas 
• Shown to better preserve nutrients in breast milk and formula 
• Aids in digestion for a good nights sleep 
• Offers a flow rate that supports breastfeeding 
• BPA free, dishwasher (top rack) and sterilizer safe