The solar cooker is a device which uses the energy of sunlight to heat food or drink to cook. It is cheaper than Gas Oven. Solar cookers use no fuel, which means that their users do not need to pay for firewood, gas, electricity, or other fuels. Therefore, over time a solar cooker can pay for itself in reduced fuel costs. Since it reduces firewood use, the solar cooker reduces deforestation and habitat loss. Since there are about 2 billion people who are still cooking on open fires, widespread use of solar cookers could have large economic and environmental benefit Solar cookers are a form of outdoor cooking and are often used in situations where animal fuel consumption is important, or the danger of accidental fires is high.