Barbara Kerr who created the cardboard Solar Box Cooker, also uses these rectangular cans. >> View
into Barbara Kerr's wooden solar box cooker, mounted into her kitchen
wall. She can easily bake cookies, dinner, or heat water in it.
Kerr didn't begin solar cooking until she was 50, and now at 80+ is an
expert and inventor for solar methods. She patented her unique solar
wall oven design, and continues to teach solar and low-fuel methods
(Rocket stove cooking ala' Dr. Larry Winiarski's design) to this day in