Description Made of cast iron, John Wright Lattice Steamers feature a resilient porcelain finish inside and out to resist rusting and chipping. Used for humidifying, steamers bring a pleasant fragrance to a room when filled with potpourri. Unique in design and of the highest quality, our steamers are functional as well as decorative stove accessories. Matching Forest Green Lattice Trivet, #33-343 is recommended. Holds about 3 quarts of water for 8 or more hours of use under normal conditions.