I made a two layer blanket for my kettle out of this stuff below. No need to move my kettle with 3 1/2 gallons of liquid into my oven. I also made a three layer piece for the lid.
https://www.lowes.com/pd/Reflectix-33-3-sq-ft-Reflective-Roll-Insulation-16-in-W-x-25-ft-L/1014123