There are a lot of very good ideas, modular systems and truly brilliant designs, this one won't be brilliant (sorry).

I do it to practice modeling in Fusion360 and the result has been fun, I have designed a combination of several pieces with a height of 5cm and 9.5 cm, I think they will go well, making combinations and fitting them together will result in trays to organize things not too bulky, classic for desks or work tables.

I have generated pieces with full walls and others with a hexagonal shell.