1. NEVER USE PLASTIC CONTAINERS IN MICROWAVE OVENS
2. Never use plastic wrap in a microwave oven
3. AND, Never place water bottles in a freezer.
Dioxin chemicals causes cancer, especially breast cancer.
Dioxins are highly poisonous to the cells of our bodies. Don't freeze
your plastic bottles with water in them as freezing releases dioxins from
the plastic
Dr. Edward Fujimoto, Wellness Program Manager
at Castle Hospital explains this health hazard.
We should not be heating our food in the microwave using
plastic containers. This especially applies to foods that contain fat.
He said that the combination of fat, high heat, and plastics releases
dioxin into the food and ultimately into the cells of the body.
Instead, he recommends using glass, such as Corning Ware, Pyrex or
ceramic containers for heating food. You get the same results, only
without the dioxin. So 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.
It's just safer to use tempered glass
He reminded us that a while ago some of the fast food restaurants
moved
away from the foam containers to paper. The dioxin problem is one of
the
reasons.

Also, he pointed out that plastic wrap, such as Saran, is just as
dangerous when placed over foods to be cooked in the microwave. As the
food is nuked, the high heat causes poisonous toxins to actually melt
out of the plastic wrap and drip into the food.
Cover food with a paper towel instead.