This glass was done with a simple Blinn shader. There is an extensive bump network which gives the reflections some tooth to catch on to. The dust is a combination of material, texture, and fur. The cork is a quick procedural.

There is a high resolution version at: http://www.maiden.org/jeremy/public/dusty_bottles.jpg

You can also download the full scene file including geometry, shaders, file textures, lights, gobos and environment maps at Gnomonology.

http://gnomonology.com/tutorial/223