Construction of the solar funnel cooker, safe, efficient, easy to build and to use.
Very cheap, easy and efficient cooker.
Parabolic cooker can be dangerous (causing fires) and complicated to make. This cooker gave results comparable to the ones given by a "cookit" cooker and a solid wooden cooker.
French version : http://solarcooking.org/francais/funnel-fr.htm
Portuguese : http://solarcooking.org/portugues/funnel-pt.htm
*A glue such as white glue, and water to mix with it 50-50. Also, a brush to apply the glue to the cardboard (or a cloth or paper towel will do). Or, some may wish to use a cheap "spray adhesive" available in spray cans.