How does the New Cooking Bag work?
The New Cooking Bag is used for cooking food without continually heating it.   The food is put on the fire in a pan and brought to the boil.
We then place the pan and its contents in the New Cooking Bag.   A cushion goes on top, we pull the string to close the bag, and then leave it to cook.....
The fire can then be put out.....   The New Cooking Bag insulates the pan, keeping the temperature inside high enough to cook the food.
  All the goodness is preserved. You can taste it!