This is a modern interpretation of a Zhen Xian Bao – a traditional thread case. Even cursory research on teh interwebs reveals astonishing combinations of these little compartments, nested in other compartments.
This fold was designed by Paula Versnick, and has 7 separate compartments of varying size, that all lock together into a charming little book.
Traditionally made from mulberry-based paper that is remarkably tear and pest/insect resistant, there are examples of these things that are hundreds of years old, often indigo dyed but still entirely functional.
Made in an increasing module style, I can imagine ways of engineering this to be arbitrarily larger, as each smaller unit has pockets strategically placed to accommodate tabs from the larger unit – brilliantly complicated.
Careful choice of paper can make these endlessly decorative and intricate. Wet folded, the paper retains memory of being closed so springs back to form after being opened.