Square "Perfect" coaster

Made modifications to The perfect coaster AKA 'Perfster'
by magonegro http://www.thingiverse.com/thing:976069 . After printing the original I wanted some changes including more drainage so i raised the overall height and added square corners for water reservoirs. I also removed approximately half of the interior ridges. Many thanks to magonegro for the original design. Tell me what you think.

Coaster is square photo was taken at an angle