I was getting near capacity with my old storage container for my Copic Markers. I used the same internal frame design (fluorescent light insert, bolts, nuts, washers) to make a new frame to put in my 31 Square Utility Tote. This is so easy to move around the house, yet keeps all my markers in color order (which is how I function best) so they are very easy to find.
Now I can add to the collection! It's amazing that no matter how many colors you have, it seems as if you never have the right one!