Material: Enamel with BPA-free plastic lid with silicone gaskets and steam-release vent.  Small container : 4.5 cup - diameter 5 3/4" x 2 5/8" (h) Medium Container: 6 cup - diameter 6 3/8" x 2 3/4" (h) Large Container: 8 cup - diameter 7 1/8" x 3" (h) - 100% food safe - 100% recyclable, natural raw materials with non-toxic paints - Each product is handcrafted by artisans - Dishwasher safe - Oven, gas, electric and induction stovetop safe. - Freezer safe. - Do not microwave! It is made of steel. - Enameled iron is incredibly strong, but the porcelain topcoat will chip if handled too roughly or dropped onto hard surfaces — revealing the metal frame underneath. When this happens the steel below naturally oxidizes and the enamelware remains safe to use.