For one day a week, we use paper boats or trays instead of Styrofoam trays. ... For example, when you put hot beverages in Styrofoam cups, it releases a chemical called styrene in your drink.

For weeks, fourth graders Celine David, Maddie Woods and Dora Cabarcas have led a renewed push to ban single-use polystyrene, or Styrofoam, lunch trays from Houston ISD cafeterias.