I've never had any food burn in this cooker.
I have also cooked food in the mountains, at an altitude of
around 8,300 feet. If anything, the food cooked faster there--the
sunlight filters through less atmosphere at high altitudes.
I find that people are surprised that the sun alone can
actually cook food. And they are further pleasantly surprised
at the rich flavors in the foods which cook slowly in the sun.
This inexpensive device does it!
Students at Brigham Young University have performed numerous
tests on the Solar Funnel Cooker along with other cookers.
We have consistently found much faster cooking using the Solar
Funnel Cooker. The efficiency/cost ratio is higher than any
other solar cooking device we have found to date. Mr. Hullinger
also performed studies of transmissivity, reflectivity and
absorptivity of alternate materials which could be used in the
Solar Funnel Cooker. While there are better materials (such as
solar-selective absorbers), our goal has been to keep the cost
of the Solar Cooker as low as possible, while maintaining safety
as a first priority.
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