I have wanted one for a long time, but if you follow the link I put up there, you can see they are rather expensive, and so that was out of the question. Particularly, since I don't know how much I would actually use such a thing, I tried, more than once, to find a pattern to sew my own, but there didn't seem to be one available. A couple of days ago, I happened to see a video on YouTube that taught me how to make one! So, I did! And there it is! I didn't have to go and purchase anything to make it. I already had the fabric, and wool fiber for stuffing, and my husband had paracord and the little clip thing for cinching it up. Here is a link to the video:
I tried it out today, to cook our supper, and it worked perfectly! I used my 5-quart cast iron Dutch oven to make this wonderful meal. Here is how I did it.
Heat the pan and then add a little lard (or other fat of your choice) and some chopped up bacon.
Brown 6 pieces of chicken. (I had thighs.)
Add 1 Tablespoon of all-purpose flour, 1/2 teaspoon ground poultry seasoning, salt the chicken well and add some black pepper too.
Then pour in 2 pints of chicken stock or bone broth and 2 cups of water. Also 1/2 cup plain full-fat yogurt.
Add a chunked onion, some minced garlic and a few potatoes cut into chunks.
Cover and bring to a boil and then simmer for 15 minutes.
Place the hot lidded pan into the cooker. (I lined it with kitchen towels to keep it clean.)
Cinch up the bag, inserting the "lid" carefully in the top of the cooker. Tuck it in all around.
Let is sit for 4 hours. Then open it all up. Be careful. It is still hot!
I checked the temperature when I opened it, just out of curiousity.
I couldn't wait. I ate dinner a little early tonight. It was delicious!
This little bag saves energy, is convenient and safe to cook while you are away or even overnight. There is also a Wonder Oven, that is larger, and I have seen examples of where people just use lots of blankets and towels to wrap pots up and put them in a laundry basket. These used to be called "hay boxes" and hay was used as the insulation.
It was fun. It was not difficult to make, although it did take me a few hours to do it! Next time will be easier. If you found yourself in a situation where you had limited fuel for cooking, this would be very convenient.