Summary

Simple self-watering pot. Grow medium is placed in the upper chamber (including the tube that goes down in the middle into the reservoir). Reservoir can be filled with water from a spount on the side.

Now prints as two pieces (based on @Mavic's suggestion). Place the parttion inside before filling with grow medium.

Fully customizable. Even more so if you are willing to edit OpenSCAD.

N.B.: Please only use the v4 files. Looks like Thingiverse won't let me remove the old files.