A modular organizer for anything that can come to mind.

This profile includes :

1 container

2 separators with no slots for the big sections

4 separators with 2 slots 

2 separators with 1 slot

These are enough for the combinations shown in the pictures, print as many as needed.

To assembly just insert the flat separators into the side slots in the tighter orientation.

All separators with slots can be interlocked, print as many as you need for your use case. 

One square can fit:

2 single slot separators

4 double slot separators 

a combination of a double slot separator and 2 single slot separators to make 6 holes instead of 9