The Bottles don''t have thickness, which prevents shading them correctly. There are no fluids in the Bottles. There''s no way to actually shade this to be physically correct. This makes them work only as objects very far in the background so nobody notices this. Very sad, wasn''t able to fully see this on the preview renders or the wireframe shots. Be careful if you wan''t to use this asset in a more exposed position in your renders.
These came from a free 3d models found on the web, as I spent much time to adjust materials and geometry I thought to have the right to sell them Obviously you can look for the free models with standard materials 3dsMax 2014, .Obj file included