This roaster utilizes advanced engineering techniques resulting in a 40% reduction in oil-based polypropylene resin, while providing a structurally stronger container. Contemporary design polypropylene lid is easily secured and will not crack. Leak-resistant lid fit eliminates the need to over wrap or tape. Double vents allow steam to escape freely and anti-fog material formula reduces condensation buildup. Use with cold foods, refrigerated foods, hot foods, heat lamps and warming units. Microwavable and reusable.