My family uses the bowl holders I make all the time (see photo above) and have never had a problem; however, they don't stay in the microwave longer than 4-5 minutes, which is more than enough time to heat up something in a soup bowl like soup, stew or chili. Also, we usually stop the oven and stir about halfway through. I've read the horror stories about these things (and the baked potato bags) spontaneously combusting, but haven't had a problem yet. As I said before, I use the Quilter's Dream 100% cotton batting.
Originally Posted by
gale
Just me but I wouldn't put any fabric in the microwave no matter what batting is used.