Hard Anodising was first developed by Russian scientists to produce a metal surface tough enough for space travel. The same technology is used by Futura to make Hard Anodised Cookware.The 4.06 mm extra thick hard anodised base allows you to use less oil for more healthful cooking.The lid handle is uniquely designed - it is long enough to accommodate the thumb and fingers comfortably when gripped. The Cook-n-Serve Bowl is suitable for domestic gas, electric, ceramic and halogen cooktops.