Here is a GTE inspired drinks coaster I designed.

Printed on a multi coloured printer, it's a 3mf file with different elements in it so it's easy to colour in the elements in software, such as Bambu Studio (I printed this on my Bambu Labs X1 Carbon with AMS)

I also designed a 0.6mm thick base that you can print in TPU and glue onto the bottom to give it a nicer coaster type finish (cushioned feel and helps the coaster to stick a little nicer to the surface rather than the bottom of the cup :) )