Holding the lower bulb in your hand causes the liquid inside to boil and shoot into the top bulb. The body heat causes the liquid to appear as if boiling.
The Hand Boiler is a great gift and the best in thermodynamics lessons!
Includes: 1 hand boiler.
Made of glass.
Westminster Toys' approach is to find the best opportunities to bring the greatest value to their customers. Westminster's founders embodied this philosophy, building a company with a wide breadth of expertise of toys, gifts, novelties, and more.