NO do not microwave it. #1 you have metal around the top cap to keep it on and it will damage the hormones. I dont remember what the heat range is but will try to find it.
Quads and glutes should be 1 1/4 - 1 1/2
I would suggest 225f for 20-30 min sitting on a cooky sheet in the over. You might want to vent the top with a needle since yours is loose and may come off due to pressure. Typically it wont but in your case it might.