Help, Green Living Experts. Where can I find freezer paper made without chemicals?

I am replacing plastic containers with Pyrex Glass. I have learned that washing plastic containers in the dishwasher or placing plastic containers in the microwave, causes a carcinogenic reaction. Now I have to retrain myself with freezing. Can I find a good and safe freezer paper?

Many thanks for helping me.
Jean & Marcia, Thank you for your good ideas.
Marcia, have you seen the metal brownie tray that has a metal "ice cube" type divider so that the brownies can come out already cut. This might be helpful for you.