(I'll tell you exactly how to do this later on.)
The Solar Funnel Cooker is safe and low cost, easy to make,
yet very effective in capturing the sun's energy for cooking
and pasteurizing water -- Eureka!
Later, I did extensive tests with students (including
reflectivity tests) and found that aluminized Mylar was good
too, but relatively expensive and rather hard to come by in
large sheets. Besides, cardboard is found throughout the world
and is inexpensive, and aluminum foil is also easy to come by.
And individuals can make their own solar cookers easily, or
start a cottage-industry to manufacture them for others.
Prototypes of the Solar Funnel Cooker were tested in Bolivia,
and outperformed an expensive solar box cooker and a "Solar
Cookit"-- while costing much less. Brigham Young University
submitted a patent application, mainly to insure that no company
would prevent wide distribution of the Solar Funnel Cooker.
BYU makes no profit from the invention. (I later learned that
a few people had had a similar idea, but with methods differing
from those developed and shown here.
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