I printed these over the course of the last week and I absolutely love them. I may attempt to print another batch using a 0.2mm nozzle as the 0.4 nozzle doesn't do the detail of these coasters justice. If you look closely, you can see where certain details are either missing (denoted by areas missing filament) or lack definition between filaments (denoted by what I've dubbed blobby lines).
One small suggestion I'd make is regarding the coaster holder and nameplates.. Rather than use glue to attach the nameplates to the coaster holder, a simple flange along the bottom and/or edges of the nameplates, along with the associated grooves in coaster holder could make it easy to simply slide the name plates into place.
Thanks buddy! Good ironing settings, if you want to print other things using these settings you can open the coaster file in the slicer and then delete the object and add your own to get the same ironing.