How long can breastmilk be kept in a cooler carrier?

  • You can safely store your breastmilk for up to 10 hours* with Pump In Style Advanced and Freestyle breastpump cooler bags.   *When Ice pack is frozen solid.
  • Direct exposure to the sun, like leaving the cooler in a car, severely reduces the cooling effectiveness. 
  • Breastmilk is safe stored in a cooler at/or below 59 degrees for up to 24 hours.
  • The liquid inside the cooling elements is water with food grade dye.  The liquid is non-toxic.
  • Medela does not have recommendations for storing breastmilk with dry ice.  Consult a lactation consultant or healthcare provider for further information.