These coasters feature 21 unique designs using infill (including 2 originals by me), with an 85mm diameter. You can adjust the height from 3-4mm, and it will work fine, but I recommend using 4mm. No top layer reveals the infill patterns (e.g., octogram spiral, triangles, gyroid) for a decorative effect. I've tested on the Bambu Lab A1 Mini with PLA (0.2mm layer height, 30-40% infill, glue stick for adhesion). Adjust the infill percentage to change the size of the pattern. Ideal for gifts, home decor, and everyday use. 

To change the design of the coaster, go to the sidebar on Bambu Studio after opening the file for the Customizable Infill Coasters and locate the gray tab that says process. To the right of it, you will see (Global) and (Objects), select (Objects). Then there should be the coasters below, select one until it turns blue, and then change the infill and or percentage, and it should only affect that coaster. I will add a more detailed PDF with pictures on how to do this soon.

IMPORTANT: Let the coasters cool before removing them from the bed, as they may warp or bend!

Also, the model for the customizable coasters appears to be just solid circles, but this is because the infill gives it the design and is not visible in the preview.