Here is a similar youtube vid that was missing from the original link above.
And here is a debunk
http://laweinstein.com/blog/heat-transfer-thermodynamics/debunking-the-eco-cooler/
I am surprised at the very expensive Wilderness First Aid (WFA) class, but maybe I should not be. One big part of that course is how to handle emergencies that are more than 30 minutes (up to hours from outside professional help) from help from EMT response.
If any of you remember Jim Foreman from the old yahoo group, he was an advocate of using commercial outdoor plugs ..lol. I hope he is well, now living in Texas.
Bag salads, to me, seem like playing russian roulette with the diet. It seems every year some group of people die from luckily finding contaminated products.
https://www.nestandglow.com/life/salad-bags-unhealthy
Great Value red lentils are split and go good with one half ramen block soaked for an hour
Boiled eggs (crack blunted end of egg for easy peeling, bring to boil and turn off, set aside for 1 hour while they cook)
Great Value extra sharp cheddar cheese