How long can milk stay out of cooler?
How long can milk stay out of cooler? In general, perishable foods like milk should not sit out of the refrigerator or cooler for longer than two hours. Cut that time down to an hour in the summer if the temperature reaches 90 degrees F. After that time frame, bacteria can start to grow.
Can you travel with milk in a cooler?
Tips for Transporting Breast Milk on a Flight You can get a lot more milk in a cooler when it is flat. Purchase a cooler that has a leakproof zipper and closed-cell rubber foam lining to ensure milk will stay cold. I used a YETI cooler and it kept milk frozen for an entire day!