stainless steel surrounds an aluminum core for efficient heat distribution; interior does not discolor, react with food, or alter flavors Cool Grip handles are solid stainless steel riveted stick handles that stay cool on the stove top; provide a safe a solid grip Rim is smoothly tapered to eliminate drips and spills while pouring; tight-fitting stainless cover seals in moisture Oven safe to 550 degrees F; cooks on stove top, in oven or under broiler; freezer safe for easy storage Product Built to North American Electrical Standards Tight-fitting stainless steel lids fit tight to lock in flavor, texture and nutrients. Wide, easy grip handles.