"""""""It is a very interesting model.""""

You are speaking of a "real glass?" correct? not this model.

Remember that in MoI, a solid is a "closed volume". But you can still go inside of it and look around (In the real world, you couldnt do this)

A "surface" is infinitely thin. it has no volume or thickness matter to it... For that bottle to be "glass", it would have to be "modeled with 2 sides"...

So, create a cube, then run Shell on it. The cube now has walls with thickness and an inner hollow area.