Hi Chevi--- These cooling elements have been tested by our team with our Medela Cooler Bag. They have not been tested with non-Medela insulated bags. In our cooler bag with 3 ice packs, the breast milk can be kept cool for up to 8 hours. You will also want to keep in mind that direct exposure to the sun, like leaving the cooler in a car, severely reduces the cooling elements effectiveness. We hope that information helps. If you need further assistance, please consider chatting with us on our website. Have a great day!
Date published: 2018-08-08