Yea, it's another generic coaster, with that hex pattern on top. But there's a twist for the printer.
It prints upside down.
First the practical reason: Printing upside-down leaves that Awesome Prusa textured build plate surface on the top of the coaster. The bumpy top means glasses with condensation on them won't do that coaster gets stuck to the bottom of the glass thing. -- which is actually kind of annoying when a wet plastic coaster drops off and gets the surface you're allegedly protecting with the coaster wet.
Now to the bragging rights.
The bottom of the hexes show off how well the Prusa handles minor overhangs.
The bottom of the coaster shows that the Prusa can make a top-layer smoother than some printer's bottom layer.
Can your printer do that? Prusa, Hold my Beer!
The author marked this model as their own original creation.