> I've never purchased a piece of tuperware that said it would release microplastics into the food if I put it in the microwave.

One thing to be skeptical or open minded or whatever but this statement is just stunningly naive. That you would only consider it if the company selling it tell you that. There is a thing called using your brain to come to independent conclusions. I'm probably just pissing into the wind here because I realize the current discourse it that you must listen to your betters and believe only the experts or whatever.