These round (why do bins have to be rectangular?) bins can be snapped together on the top, left, bottom or right. They can be made from any color and the drawer handle is a smile.
You can add to them anytime you need to organize.

More detailed instructions at:
http://www.instructables.com/id/Modular-Storage-Bins/

The connectors are printed at 100% fill.
The "storage end" is glued to the "storage drawer" with superglue.