I made some cherry blossom coasters with a holder to store them!
This is a set of 4 coasters and the holder that all sit flush together. I made indentations on the bottom of the coasters to fit rubber feet.
I set a mug on a coaster with boiling water for ~20 minutes and small warping occurred so I wouldn't recommend using hot drinks for long periods of time.
If you like what I'm doing, consider buying me a coffee. Much thanks!