Indeed, boilers come in various shapes and sizes, typically consisting of a wide cylindrical metal container with several key components: a handle, an outer container holding the working fluid, and an inner container holding the material to be heated.

The smaller inner container, filled with the substance to be heated, fits inside the larger outer container, usually filled with water. Heat is applied to the base of the boiler, causing the temperature of the materials inside to rise. The constant boiling temperature of water in the outer container prevents the contents of the inner pot from boiling or scorching, ensuring controlled and effective heating.