Professional chefs and home cooks recognize the necessity of the double boiler. It rests above water to gently cook foods without scorching them. The rounded design of the stainless steel universal double boiler facilitates easy whisking while slowly cooking a delicate chocolate sauce or a creamy sabayon. Uniquely shaped to fit 2,3, and 4 quart saucepans, making it a versatile piece in the kitchen. This Cuisanart® Chef's Classic™ Stainless Cookware piece is composed of Stainless Steel for unsurpassed durability and performance. We guarantee it with a lifetime warranty.