 EPS foam is sometimes incorrectly called Styrofoam as a generic term.Styrofoam is a trademark of The Dow Chemical Company for closed-cell extruded polystyrene (XPS) foam, used for thermal insulation and craft applications.By contrast, EPS foam is typically white and made of expanded polystyrene beads, and used for disposable coffee cups, coolers, or as cushioning material in packaging.