This enamelware mug is created by baking a porcelain enamel surface onto high quality steel. Avoid using abrasive cleansers on the surface. Be careful when using sharp-edged metal utensils to keep from scratching your items. Scratching and dulling of the surface is likely to occur over time. Metal can never be used in microwave.
As the surface is ceramic it will chip if dropped or handled roughly. Chips affect appearance but the items are still usable. However you might see rust on pieces if the items are not dried properly.