Most Helpful Girl
You would probably have to look at the specific soup in question and compare the ingredients to a list of know carcinogens.
Most Helpful Guy
No just to cancer charities. Microwaved Styrofoam has been linked to autism. You should microwave the water in a glass dish then pour it in the soup. Or try getting one of those pre marked pyrex glass dishes and cook the soup in that. It's not the soup it's cooking it in the cheap plastic container that leads to health problems.