Stackable parametric bowl for puzzle pieces

This is a bowl I created to help my family sort puzzle pieces by color.
Of course there are many other applications such as keeping peanuts, chips, or screws until use :-)
The bowl has the shape of a puzzle piece (Note: The ones on the photos have a too small diameter on the inner "connection points". This issue is solved in the STL and f3d file.
They are stackable for the times they are not in use.
I added the f3d file so you can play with the dimensions. I printed them with 120mm edge length. It shoud be possible to make them from appr. 50mm (below are some radius problems) to actual size of your printer bed. The attached STL file has 100mm.
I made them from PLA without support.