Insulated Bag Retains Heat To Slow Cook Food With Less Energy

Insulated Bag Retains Heat To Slow Cook Food With Less Energy
Design & Architecture

Eco-friendly Wonderbags reduce carbon emission and costs while preparing meals.

Yi Chen
  • 25 january 2012

Wonderbag is a clever invention designed by a South African company that slow cooks food after it’s been brought to boil. Once the food has been heated for a few minutes on the stove, the pot can be placed in the heat-retention bag to continue  cooking while left standing. The Wonderbag is greatly benefiting communities in developing countries as it reduces costs through conserving energy, water usage, and ensuring that food is not burnt and wasted. The cooking bag is also eco-friendly as it decreases carbon emissions and toxic fumes. It’s made from poly-cotton and recycled polystyrene balls.

To cook rice, it only needs to be placed on the stove for two minutes, before wrapping the pot inside the Wonderbag for another hour. For meat, it needs to sit on the stove for 20 minutes before being placed in the Wonderbag for five hours. The chart below shows the cooking times for various food items.

Over 150,000 Wonderbags are already in use across South Africa. Consumer goods giant Unilever also placed an order for 5 million Wonderbags where most of them were distributed to consumers as part of the Rajah curry powder promotional campaign.


+carbon emission
+consumer goods
+developing countries
+Environmental / Green
+South Africa

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