This is the way I now store my Copic markers. I like to take them with me when I go places but hated to have them all mixed up. This is a cooler that I found at Wal-Marts for $9.00 then used some foam core board to make the dividers. I made the sections different sizes.
This is the inside view of the bag how I have the markers divided. The lid is on the bottom.
This is the side view of how I have the extra images that I want to work on. I keep them in a plastic photo organizer.
This is back view of how I have the straps locked down when I have the case on my desk. I put the lid on the bottom.
This is the front pocket where I store my refills, a small light, my ink pad just for using with my Copic markers and some hand sanitizer to clean my hands from the markers.
Hope that you find this info helpful.