The STL files include both the full stand and a split version for smaller printers (or quicker print times). The split version has an extra lip so it can be easily glued together.

Top part comfortably fit a citadel paint pot and a plastic funnel.The bottom part is suitable for dropper bottles up to 32 mm wide.

The funnel I use: https://amzn.to/44nueRHThe dropper bottle (30ml) I use: https://amzn.to/3QYpGhA

Using these funnels and dropper bottles are recommended but anything remotely in size should fit just fine.

Update: Added a bottom part suitable for dropper bottles of the same size as Vallejo.