Solar Cookers International Network (Home)

solar water heater & pasteurizer made from everyday recyclables


tools and equipment:
  • scissors
  • knife
  • glue
  • tape
  • thermometer*


  • 1 or 2 liter clear plastic soda bottle.
  • 12 oz. aluminum soda can
  • corrugated cardboard box approx. 16" x 16" x 16"

  • aluminum foil or reflective plastic from inside chip bags, etc...


  • 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:  

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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


©eric marlow 2003

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