Johns Hopkins recently sent out the following (2005) in their newsletters and it is also being circulated at Walter Reed Army Medical Center.
No water bottles in freezer. No plastic wrap in microwave ovens
Dioxin Carcinogens cause cancer, especially breast cancer. Don’t freeze your plastic water bottles with water as this releases dioxins in the plastic.
Dr. Edward Fujimoto from Castle hospital on a TV program explained this health hazard. (He is the manager of the Wellness Program at the hospital.) He was talking about dioxins and how bad they are for us. He said that we should not be heating our food in the microwave using plastic containers.
This applies to foods that contain fat. He said that the combination of fat, high heat and plastics releases dioxins into the food and ultimately to the cells of the body. Dioxins are carcinogens and highly toxic to the cells of our bodies. Instead, he recommends using glass, Corning Ware, or ceramic containers for heating food. You get the same results, without the dioxins.
Such things as TV dinners, instant frozen foods and soups should be removed from their containers and heated in something else such as tempered glass, corning ware, etc. Do not use Paper, because the contents of the paper are unknown.
To add to this, Saran wrap placed over foods as they are nuked, with the high heat actually drips poisonous toxins into the food, use paper towels.