Hard Anodised Aluminium - tough and durable, will not pit, tarnish or corrode and will stay looking new for years The 4.06 mm thick base and sides spread heat evenly and retain warmth for a long time making it an excellent utensil for both cooking and serving. It is offered with Hard Anodised Lid Cooking and serving in the same bowl makes good sense the food stays hot longer and you have less to clean up and less for storage The Futura Hard Anodised surface is non-toxic, non-staining and non-reactive with foods. Metal ladles can be used It is thermal-efficient, heats fast and evenly and is not spoiled by high heat. It can be used on domestic gas, electric, ceramic and halogen cooktops"