Coaster with Felt pad

My dad wanted a coaster that would hold a felt pad and allow the moister to drain under it as well as allow it to evaporate out the side so he tea glass would stay dry.

this is what I came up with.

you don't need the Felt pad but if you want it this is where I got it.
https://www.amazon.com/dp/B001WAK5ZC/ref=cm_sw_r_cp_ep_dp_QrqBAb29RYXW0

Print instructions

I tested the print in PLA, ABS and PETG all seem to work fine.

Resolution: whatever you want.

Rafts: No

Supports: No