I cut this out of cork.
https://www.amazon.com/dp/B0D2NL62S1?psc=1&ref=ppx_yo2ov_dt_b_product_details
The link above has an adhesive back and I did not use the adhesive. Just left the backing on.
To get a successful cut with my 60W laser, I used 80% power at 0.5in/s. I cut the cork from the adhesive side up and covered the bottom, cork side, with painters tape to avoid burning it.
Cup_Holder_Insert.DXF | 21.8KB |