Even a one-piece item has complex internal stresses and deflections that are not accurately represented by a geometry solution, particularly if the supporting surface for applying loads to the suction cup is not perfectly parallel to the surface the cup is applied to.
Aside from the image of a suction cup, which can be easily gotten by photographing an actual suction cup, what information are you looking to gain from moving the suction cup?
This search may help https://www.google.com/?gws_rd=ssl#q=suction+cup+analysis
