100 x 100 x 4mm Bambu Lab (A1, P1, P1S, X1, X1C) build plate drink coaster with auto-bed leveling. I printed it using PETG but any filament should work. There are two versions. One with text and purge lines and one without (blank top).

For an A1 Mini version check out the Bambu Lab A1 Mini Build Plate Drink Coaster.

Used the default settings for the “0.16mm Optimal @BBLX1C” system preset except for the following:

Quality > Line width: 0.42mm
Strength > Walls > Wall loops: 3
Strength > Top/Bottom shell layers: 4
Strength > Sparse infill > Sparse infill density: 15%
Speed > First layer speed > First layer: 40mm/s
Speed > First layer speed > First layer infill: 85mm/s

If you have a Bambu Lab AMS, AMS Lite, or any printer that can print two or more colors on the same layer, and you're using the Bambu Studio or Orca slicers, then follow these steps, or load the ‘3mf’ file, or you could just print using the print profile.

1. Load the step file
2. Make sure you have at least two filament colors. The first one a light color (white) and the second one a darker color (black).
3. Split the model ‘To Parts’
4. Paint the model: I found that the best way to paint the coaster was to set the base filament color to the color that you want the text to be (light color). Then find the build plate part under “Objects” which should be the first part, then select the darker filament color from the ‘Filament’ color dropdown.
5. Flip the coaster face down to get a smooth or textured top surface.