Recent studies found that melamine, an industrial chemical used in everyday
items such as cooking utensils, plates, paperboard and industrial coatings can
seep into food when it's heated. Long-term exposure to the chemical could lead
to health issues. The FDA has said that the amount of melamine that consumers
are usually exposed to in these types of tableware is not dangerous, but the
public should be cautioned to refrain from heating these items in a microwave.