Microwaving plastic
It is important for you familiarize yourself with the symbols that adorn various plastic containers, toys and other products made of plastic. Once you know the different types of plastics, it should be noted that none of them are recommended for microwave heating. In fact, plastic containers labeled "microwave safe" just mean that they won’t melt while being heated. Keep in mind that heating plastic increases the potential for the penetration of chemicals into the food you eat.