I mixed a mandala coaster with a flat pokeball design I found to make a somewhat decorative pokeball coaster. It could probably be edited to have less flat space on top but that is up to you. Originally printed on TPU.

I did not include a holder but that could be downloaded from the original mandala coaster. Mandala Coaster w/storage: https://www.thingiverse.com/thing:4631189 Flat Pokeball: https://www.thingiverse.com/thing:5007067