Not what this threads about, but since you brought up the cooking in plastic, it really is bad for you.
A short discourse for those interested. Plastic is usually a hard brittle substance. The flexible kind are "softened "with chemicals called phtalates. these do leach out of plastics, but especially so if the plastic is heated.
Pthalates are in everyone. They are estrogen mimickers in our bodies. There is a theory, and only a theory, that is till we get human guinea pigs, that the increase in prostate and breast cancer is related to these levels.
And yes I use plastics, but do try to minimize my exposure