Get more usage out of your Milwaukee Packout small parts organizers (not low profile). These stacking trays fit like a glove, and give you 2 to 8 compartments in one bin. You can mix and match the upper and lower trays to fit your parts, or you can use just the top tray.

The 1x1 STL/3MF is for a stack of bins with no dividers.

The 2x2 STL/3MF is for a stack of bins divided in halves.

The 4x4 STL/3MF is for a stack of bins divided in quarters.

I have tentative plans to design and share dividers for the full-width bins and a triple decker version of these half-width bins, depending on how popular this design is.