Double boiler, also known as a steamer, boiling pot, or sandwich steam boiler. They are categorized by their structural forms:Tilting double boiler、Vertical Double-Wall PotStructure.

Tilt-type jacketed pots are suitable for steaming, boiling, refining syrups, stir-frying vegetables, seasonings, herbs, and baking, commonly used for heating, stirring, and cooking in the food service and processing, as well as in chemical industries.