@Night Eternal  
Thank you very much, Night Eternal :)  
Please don’t ever be shy to express constructive criticism that can always help to improve future works.  
It is true that I didn’t get Lunas Cutie Mark very centered in this one. It was the first in my series of cork coasters and getting them centered is more tricky with asymetric Cutie Marks such as Luna’s as it is with those which look a bit more symetric.
 
I have sold a couple of the coasters with their matching shot glasses at a little auction in January and I am probably going to offer them again at other auctions or I might open a vendor stall at a convention some day.

My only criticism is that it’s a bit too far left. But I love these so much and I’m hugely impressed.
 
Are these for sale?