results from years of collecting identical canning glasses, architect envisioned their use as important elements in the organisation and ease of handling of objects of different uses and different consistencies and materials. 

simple and effective way of grouping and storage. 

one limitation is the format and volume of the content. 

thus: nails, pins, screws, spool of thread, liquids, pebbles,coins, seeds, stamps, clips, screw bushings, business cards, eraser, drawings and many other things are uniform, visually identifiable and easy to handle.