Based upon an old-fashioned design, the generous 1.5-qt. capacity upper pan sits deeply inside the lower water pan, allowing warm rising steam to surround the upper pan, promoting fast and gentle heating. Both pans are constructed from durable 18/10 stainless steel with a stain exterior. The 2-qt. capacity lower pan has an encapsulated tri-ply base for quick and even heat distribution. The lid can be used with either pan, making this double-boiler extremely versatile. Dishwasher-safe.