Holds 20 mini paint pots, will hold the larger sizes in all slots with no issue they just stick out slightly.

Was printed at 0.2mm layers including first layer.
Printed using Creality Print I personal had no issues but I'm new to 3D printing.
It has evenly spaced holes in the top for a handle I̶ ̶h̶a̶v̶e̶ ̶y̶e̶t̶ ̶t̶o̶ ̶d̶e̶s̶i̶g̶n̶ ̶b̶u̶t̶ ̶t̶h̶a̶t̶'̶s̶ ̶a̶n̶ ̶i̶s̶s̶u̶e̶ ̶f̶o̶r̶ ̶f̶u̶t̶u̶r̶e̶ ̶m̶e̶.̶ Future me did it I've added a handle that should work I haven't printed it myself yet, but was designed in place using fusion 360 to fit the paint holder.
I recommend making the walls of the handle thicker than normal to allow for sanding to get a nicer finish, but you do you.