I found these 2 models and thought they would go amazing together, so I modified both sets and scaled them proportionally so they would fit together. You can comfortably fit 4 leaves, but a 5th one is possible.

I recommend the 55 deg one (pictured).

Tolerance on the coaster holder and the post is .2mm, so it should slide on easily if your printer is decently calibrated.

I recommend .2mm layer height.

Update 2/6/24:

I realized that since I used a negative part in Bambu Slicer on the sunflower coaster holder, it doesn't show up in the exported STL. The 3mf files have the correct negative part. If you want to use the STL, you will want to add a negative cube that is 8.2 x 8.2 x 13.5mm.