Thanks! For what it's worth I was looking at glass bakeware that advertises itself as heat resistant and microwaveable, from a company called Iwaki glass. Googl

Thanks! For what it's worth I was looking at glass bakeware that advertises itself as heat resistant and microwaveable, from a company called Iwaki glass. Googling suggests they make a lot of borosilicate scientific stuff but I couldn't find any info about their consumer products.