Erm, well, the back room we are stuck in is very warm (instant sweat when I enter the room with a scarf on), so "cool" isn't possible without a freezer pack. If I leave the building for lunch, I have to stay out for the entire hour, which means eating in the car. Today, it was upwards of 40°F and the car was really warm when I went out to scope out lunch. Not sure if the trunk would be cooler. I think I'm going to be stuck with non-refrigeratables or buying a stupid freezer pack & lunch bag. I hate wasting money.