I always knew that Warm and Natural really wasn't 100% cotton since it had a scrim in it. I know my best friend made me one of them using her W&N scraps. I have yet to use the bowl but I do have a low watt microwave, has a turntable and I don't microwave soup or chili longer than 3 minutes. The reason I want to use it instead of potholders is I have very poor motor coordination. I totally understand why some may not understand why this is such a helpful item because you can't even imagine what can happen to someone until it eventually will happen to you in old age or unfortunately before then.