I think that best way to discuss a flat Earth is in a proper environment with the proper foundation.

That is why I have made a flat Earth coaster. It is simple to print using AMS with four colours. The model is separated into objects, so it is easy to change colours. It is a face-down print on a textured plate with ironing on the top surface. The size of the coaster is 100 mm, and it is 4 mm thick. It was printed using PLA.