How it Works

The Wonderbag design allows food to be slow cooked or kept warm off of a heat source. It works in four, easy steps: Boil it, bag it, stand it and share it. To slow cook, simply bring food to the boil on a stove, let simmer, and then put the pot with its lid into your Wonderbag, cinch tightly with the drawstring, and slow cook to perfection for up to 12 hours

To get started, watch the video below. We have lots more advice in the FAQ too.



Here are a few tips and tricks for cooking the Wonderbag Way. Since the Wonderbag uses heat retention to cook, it slows the time a boiling pot cools to room temperature, allowing the food to slow cook.



Use the right size pot for the amount of food you wish to cook. Use a pot with short handles. Use only copper, steel, aluminium, enamelled cast iron, cast iron and glassware pots. Do not use clay or ceramic.


Tip #3: Heat Retention Effectiveness

Heat is retained more effectively when:

  • the pot is full and sealed with a tight-fitting lid

  • the food is more dense (like stews and curries)

  • the environment the Wonderbag sits in is warmer (for example if the Wonderbag is sitting in a snow drift it’ll cool faster)

  • the lid for your pot is metal; however, glass does work as well.


TIP #2 bring to the boil

Food must be brought to a gentle boil before placing in the Wonderbag. Use a tight fitting lid to allow the ingredients to be heated through. Do not place lukewarm food in the Wonderbag. Times will vary for length of boil based on recipe, type of food and altitude. Place the boiling pot immediately from the stove into the Wonderbag.


Tip #4: Cleaning your Wonderbag

The Wonderbag can be spot washed and hung to dry. Newer washing machines with a gentle wash cycle can also be used with cold water and minimal detergent. Hang dry or in a tumble dryer on a low temperature setting.


Click below for more help with using your Wonderbag: