I made this once for an exhibition. Quiete an interesting shot since it gives a view of what is normaly impossible and difficult to realize. Dof and sharpness on the same distance on one side and the view of how prism structures can reverse pictures.
The girl in the glass is sharp seen while she is in the DOF zone, and on the picture seen in the foot stem of the glass she's sitting on the other side.
Confusing .... If you think it's easy to do, try it.