
I work 12 hour days in medicine. It's hard enough finding time for a pump break, let alone running back and forth to the break room. I wanted a bag that I didn't have to carry with someone else's lunch. This colder zone keeps your milk cold for at least 15 hours from what I've tested. I have two medallion cooler bags that go well with two small lunch bags underneath. There is enough space, so many milk bottles could go in there. Speaking of which, I've shown an example of 5 ounce bottles that fit with no problem.

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