http://greenpowerscience.com/SHOPARAB...
This simple process forms a very good parabolic mirror shape across a smaller scale. This trash can lid will cook in a 4" cast iron skillet. Because the Mylar is metal, you can gather all types of sound and signals. Do not attempt signal gathering in direct sunlight.

DANIEL'S MIRROR
   • Solar Death Ray 10,000 suns 48" DIY G...