About our "Waterless Cookware: With Waterless/Greaseless Cookware, foods cooked the modern, low heat, minimum moisture way, retains a greater percentage of it's health-giving minerals and vitamins. The cookware covers are designed to form a natural "water-seal" with the shoulder of the pan when cooking on low heat. This self-sealing feature helps to retain the food moisture with it's valuable minerals and flavors. And with our multi-ply construction, heat is spread quickly and evenly allowing you to stack cook with our "waterless" cookware.