The Kyoto Box is a solar cooker constructed from polypropylene with an acrylic plastic cover.
The oven traps the sun's rays, creating enough heat to boil water or cook food.
[citation needed] After the award of the Financial Times Climate Change Challenge 2009 the design of the Kyoto Box was modified from the original cardboard to polypropylene, boosting the cooking performance.
A further innovation was the use of a white reflector instead of one covered with aluminum foil or Mylar[citation needed] The Norwegian inventor, Jon Bohmer, made the first model of the Kyoto Box with his daughters then aged 10 and 5 years old.
It later won the FT Climate Change Challenge award, placing first in the competition.