Stove Kettles humidify a home's dry air and add an old fashioned feeling to any wood stove or fireplace insert setting. Woodfield Stove Kettles are cast-iron and porcelain coated in three traditional colors. The flat black kettle is cast iron only. They feature sturdy, brass-plated handles. These kettles hold 2 1/2 quarts of water. * The blue speckled kettle is no longer available.