I've redesigned the low-profile bins from scratch to better fit the low-profile Packout. They are wider and conform to the lid so small parts don't fall out. I've also added several sizes. Check out version 2

I designed these bins to fit in the weirdly shaped middle section of the Milwaukee Packout full sized organizer. Four of these bins will fit loosely in the middle and back part of the organizer. The front is so weirdly shaped that I didn't bother trying to make a bin that fit there.

I designed the bins so that the Packout lid just touches the top. This prevents the contents from spilling out when you move the organizer.

See my other complimentary design: Packout Nesting Cups

Update 20190404:
I added a middle bin for the low profile organizers. I was given the height by another user. but I don't have a low profile organizer to test it out. Let me know if it doesn't fit right.

Update 20190513:
I increased the height of the low profile cup 2mm so that it seals against the lid better on the recommendation of @thejakeofall from Instagram. If you are going to store small parts in the low profile cups, the file labeled "43mm..." might be a better choice. Again I haven't tested this particular stl file myself.