With it's thermally-insulated double-walled construction, Durotherm is 60 percent more energy efficient than standard cookware. Durotherm is perfect for cooking foods that don't need much attention. Foods will stay hot for up to 2 hours or can be removed from the hob in half the cooking time. Goes straight to the table set in its clip-on serving base and thermally insulated lip. Engineered to seal in flavours and nutrients, vegetables cook with very little water and meats and fish brown without added fat. Durotherm cookware is built to last and comes with a lifetime guarantee.