Where heating the use of dining utensils, it is best to use glass, enamel, ceramic products, should not be made of plastic. First, the plastic system is not resistant to high temperatures, high temperature is easy to aging, the second is the high temperature is easy to release which plasticizers, stabilizers, coloring agents ...... and other additives. It is non-stick cookware such as pots and pans, the international debate on whether it is harmful to health.