Filing embroidery floss

I have a filing system for my DMC embroidery floss. I use shoe boxes and envelopes. I saved up the return envelopes from junk mail, and it didn't take very long until I had enough. I cut off the envelope flaps. I put each different color in an envelope and wrote the color number near the top of the envelope. Then I filed them in the shoe boxes. Before I made something that calls for specific color, I check the envelopes and chances are that I have what I need. I keep the boxes on my book shelves in my sewing room.