Here’s a quick lasercut project. Paul from RnD updated the inkscape box generator to include inside tabs, and I took the opportunity to tidy up my collection of old watercolour inks.

Here’s the pieces cut out:  

And glued together. I put a few drops of each on the side and wiped it to show each phial’s colour:

The code is up here:

https://github.com/paulh-rnd/TabbedBoxMaker