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 and burping.
  
  
• 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.

Buy on line at our shop www.breastpumps.co.uk and if you have any queries contact our midwife.