|tools and equipment:
- from a 1 or 2 liter clear plastic soda bottle (a) cut off the top, 1"
below where it becomes straight.
- cut 4 tabs 1/2" wide x 1" long into
the top (fig.1)
- paint a 12 oz. aluminum can (b) with black paint . it is also possible to
coat the can with carbon black from a candle or wood fire.
- put the can filled with water into the plastic bottle bottom and insert top
with tabs folded out (fig.2).
- to make the reflector (c), start with a corrugated cardboard box
approximately 16" x 16" x 16".
- cut off the top and two sides of the box. cover the two
remaining sides and bottom with aluminum foil or potato chip bags
with silver coating facing out (use wheat paste, glue and tape to
adhere to cardboard).
- place bottle on reflector (c) and place in sun. keep bottle
shadow centered on back of solar panel.
- to pasteurize, water must be heated to 150� f.
* reusable water pasteurization indicators are
available from solar cooker international
for over 30 more projects made from everyday recyclables go to:
with "recyclables kit" in subject line.
a copy of this project may be made
for educational uses only. all other rights are reserved. © eric marlow 2003