Just for Kicks: This was lit using one novatron flash head which was behind and below the mirror the glasses were on. It is reflected off of the white seamless background. That was it for lighting. :-)
Check out my 500px blog or go to http://www.andrewvernonphotography.com/2011/12/secret_of_gravity/ for a post on some of the tips & tricks I have learned while doing this glass photography!