It is made with a heavy cotton fabric and filled with styrafoam beads (the smaller the better it works)
The bottom is made with an area in the middle to place something you would like kept hot or cold
You then put on the top and it acts as an insualtor, so in emergencies you can heat a pot to boiling, place it in the wonder box, and it will then continue to cook while saving your energy of your stove
It was tested and kept a gallon of ice cream still frozen solid after 4 hours. Some people use them daily when transporting a hot dinner or cold treat over a distance, keeping the temperature or keepig it from spilling. Here is a funny view of the inside as the lid was lifted. It is really good at closing up all the gaps so no air can escape
I am proud of my Wonder Box. If anybody is interested in more information or the pattern, let me know!
(May 2011)