https://www.fda.gov/food/resourcesforyou/consumers/ucm199525.htm
It has been found that melamine does not migrate from melamine-formaldehyde tableware into most foods. The only measured migration, in tests, was from some samples (three out of 19 commercially available plates and cups) into acidic foods, under exaggerated conditions (that is, the food was held in the tableware at 160 oF for two hours).