The biggest, most important reason not to microwave plastic is that it releases dioxin into the food/oil. ย Dioxin is the most toxic substance known, and effects humans and all animals the same way. ย Dioxin is the toxic substance in agent orange. ย It is known to cause all cancers, reproductive disorders and diseases, and so many other things. ย Don't microwave plastic, don't put water bottles in the freezer. ย Also you guys, if you bleach your linens, like we're technically supposed to, bleaching anything makes dioxin, and it is in your linens. ย So, bleached coffee filters, toilet paper, disposable face rest covers, tampons, maxi pads, etc., all contain dioxin. ย Over time, contact with dioxin adds up. ย It has a half life of about 14 years, which means it's in your body for a long time...definitely long enough to cause severe health problems.Even though dioxin is naturally occuring in the environment(also found in eggs and meat), it's best to avoid taking in more if at all possible, since it is created by industrial manufacturing, especially if you have a plastics plant near you, which I do, unfortunately.Also, for those of you who have ever had surgery or who might, medical products - IV bags, tubes - contain PVC which makes them soft. ย They leach dioxin into the fluid in the bag, and dioxin finds its way directly into your bloodstream. ย You can request PVC-free products before your surgery. ย After surgery, when your products are incinerated, dioxin is created, and let out into the air.Not microwaving plastic is only a small step, but with it being created pretty much everywhere, it's still a positive thing we can do for our clients, and for ourselves.