Yes there are parts of the country in the world where the following totally does not apply. Sadly.
HHere in the mountains of utah, I have free Refrigeration that turns out. Who knew? From about midnight until 7:00 in the morning.
And was just a little bit of care that's all I need despite the hot days.
BBetween a small bottom of the line 12 can cooler, and towels and sleeping bags that I have for other reasons, if I harvest that free Refrigeration at 7:00 in the morning, using the insulation just described to keep it cool, I've got what I need for cool drinks, Refrigeration of vegetables so then instead of spoiling it a day they'll last three or four days, oh, and a cool beer at night.