The set contains 2 cylindrical bodies and two 100ml measuring cylinders.

If the body is placed in a measuring cylinder filled with cold (approx. 10 °C) water, the body floats.

If the body is placed in a measuring cylinder filled with hot (ca. 90 °C) water, the body sinks to the bottom.

At a temperature of about 50 °C, the body begins to rise to the surface.