merrylouw

I think there's no problem with 100% cotton fabrics. Just don't use Insulbrite batting because it has metal in it, which would cause sparks! Yikes!

The point is to put them in the microwave under your bowl, so it's easier to get the hot bowl out without burning your fingers. Like if you are making microwave oatmeal, the microwave bowl makes it easier to get the cereal bowl out while it's hot!