Glass Bell Jar has the same functions as a Cloche Dome. There is two significant difference from a Bell Jar and the Cloche Dome. One is the physical looks, and the second is the particular purpose of the Bell Jar. First, let us talk about the physique of the bell jar. It is shaped like a bell, With a knob and opening edges heading outward. With its additional physical feature, it provides a more natural way to open and close the jar, granting direct access to what lies within.