Yes! We transported a large amount of breast milk from Hawaii to Minnesota (military) via UPS “overnight” and when it finally arrived it was still frozen. Honestly blown away. We were expecting spoiled honestly but no. There might be other packs out there but this is what we used (the large ones) and buddy did they work well. You can imagine the relief. That was years ago 😌 thanks
@@JimmyKay1976 I see. Good question. Probably a matter of insulation of the lunch box. The milk had styrofoam and newspaper plus the ice packs. Is a mystery.
