Metal Stand Galileo Thermometer is as a decoration gift.

Metal Stand Galileo Thermometer is a must-have for the desk of any science enthusiast. The Galileo thermometer is based on a thermoscope invented by Galileo Galilei in the early 1600s. The thermometer consists of a sealed glass tube that is filled with water and a number
of floating spheres. The glass spheres are filled with and colored liquid and float
up and down according to the changes in temperature. When the temperature rises,
the spheres will sink and inversely; when the temperature falls, the spheres
will rise due to the changes in the specific gravity of liquids. You always read
the lowest of the floating temperature tags to determine the correct temperature.