Cancer News from Johns Hopkins: no plastic containers in microwave, no water bottles in freezer, no plastic wrap in microwave. doing these things releases cancer causing dioxins into your food. Such things as TV dinners, instant ramen and
soups, etc., should be removed from the container and heated in something else. Paper isn't bad but you don't know what is in the paper. They say it's just safer to use tempered glass, Corning Ware, etc.