This is a remix from both my Starbucks coaster at https://www.thingiverse.com/thing:2336265.
and https://www.thingiverse.com/thing:4975655

Two color done with single extruder and color change setting in cura to change filament. You could invoke this on LCD too but Cura is best)

I stripped off the word starbucks and you can easily import this to Tinkercad and add the default letters there (See my screenshot for how to get to letters section in tinkercad)

• See attached video on how to add the letters and position them.(Its quite easy and no resizing needed)

Instructions to customize:The trick is to insert the letter at the top middle, highlight the letters and coaster, and then rotate it, then add next letter. Once letters are in place you can rotate just the back to fine-tune the position - See demo video showing how to edit your name in here: https://youtu.be/kN7qDgesI-4
In Tinkercad, the letters are in the 'Design Starters' menu. Drag them in place (No resizing needed)

Tinkercad link to blank: https://www.tinkercad.com/things/cXymUaIY1P8

Cura filament change to next color is done at layer 15 if using 0.2 layers.

You can apply cork backing self adhesive sheet to the coaster too

See my other coasters:
Starbucks 'Your Name Coaster: https://www.thingiverse.com/thing:4844137
Heineken 'Your Name' Coaster: https://www.thingiverse.com/thing:4861554
Circuit Board Coaster: https://www.thingiverse.com/thing:4808497
Heineken Bar Coaster: https://www.thingiverse.com/thing:4855198
Victoria Bitter Beer Bar Coaster: https://www.thingiverse.com/thing:4865446