Updated 20231120
I found the previous version base(1.0) has some issues as the images show, I improved the design, and now we have a new base(2.0).
This is a coaster that can be printed 2 colors at once, usually a vivid color body with a white edge, you can choose any color you like. If you want to use a transparent material as the body, I recommend using 0% infill to get a nice light perception.
There is a base include that can store 6 coasters.
I printed it on A1 mini combo and P1P, all got a nice result.