This double pot evaporation system is not new, it's ancient. I can clearly recall seeing antique market photos from the 19th C clearly showing the double pot c

This double pot evaporation system is not new, it's ancient. I can clearly recall seeing antique market photos from the 19th C clearly showing the double pot cooler throughout the middle east. (can't find reference sorry.) It works especially well in hot dry climates where you can have extensive evaporation. It doesn't work in humid or cold climates. What's needed in North America is a return to the root cellar, and external cold sheds or window boxes for climates that fall below freezing. Again this is not new technology, but was widespread in the 19c. (again, it is amazing that I can't find any image references for window box cold storage.)