Dishwasher safe for easy cleanup, the Calphalon Contemporary Nonstick 12-in. Flat-Bottom Wok is created with multi-layer non stick for ultra durability. The stunning, contemporary design looks beautiful in the kitchen, and heavy-gauge, hard-anodized aluminum ensures even heating. Taking cues from traditional woks, this stir-fry pan has a flat bottom for stability on gas cooktops or electric ranges. It's a great size for making tempura, too.