As announced with the shot glass I recently posted for Luna Day I made a whole series of such glasses.  
I painted a little shot glass with Princess Celestia’s cutie mark and pyrographed her cutie mark onto a cork coaster to go with the glass.  
It is slightly ironic for me to work with shotglases (I don’t like alcohol so I always require the assistance of friends whenever I need working materials such as empty beverage bottles ;)), but there is going to be a series of MLP shotglases comming up and maybe I can sell a few of them at an upcomming art auction in Cologne.  
Since the coaster is mostly blocked by the glass in the above picture, I uploaded a scan of just the coaster separately.