*NOW* I see the lid wasn't completely flush when I took the photo. XD
I didn't copy everything shown at the Japanese doll blog. For starters, this is a slightly different box.
Lining up the innards with bubble wrap.
The double sided tape is for keeping the bubble wrap in place.
This was a "test run" but if I were to store doll heads for real in here, I would wrap every doll head in a sandwich wrap bag. The tissues you see between the heads came with/from doll wigs. The two heads on the ends were stood upright. Because there was a lower clearance in the middle of the box due to the way the plastic was molded, the two heads in the middle were laid down to one side.