This container is made to add @3dprinty's twisted puzzle negative volume (https://www.printables.com/fr/model/345982-print-in-place-twisty-puzzle-box) to Brien Allison's original Flower Iris Box.
There is a .3mf file from PrusaSlicer with the negative volume ready.
You can simply grab the .stl file if you wish to do it yourself.
I added the Freecad file in case you want to modify this model to suits your needs.
You'll need to print the collar, 6 links and 6 doors from Brien Allison's link (https://www.printables.com/fr/model/313479-flower-iris-box/files)
The author remixed this model.
Remade in Freecad, this container is larger to add @3DPrinty 's Twisted puzzle negative volume inside.