I brought some raw lambs wool to insulated first lit I had to wash it first and it was a pain to dry .Once dry I brushed it out into stuffing made ria a bag using a duvet cover I got of ebay its not that hard to do but gad to ask hubbys help to mark out circles and sections.
This rias thermal cooking bag.
So then I thought there must be an easier way so I brought a mandala round table off amazon I lay it on top of an old duvet cover and cut round it for my inside circle I then used the pattern on table cloth th create the section s the base circle and side sections.
It worked out great .
What an ingenious idea I'll have to research this a bit more. I try not to use my hob or oven too.