I decided to make my own Copic pen holder instead of buying one of those plastic cases. I use empty sticker rolls from my local scrapbooking store and covered it with some old paper from my stash.
Great idea! I used empty pirouette cookie tins to store my BIC markers. I hot glued them together in a triangle (one resting on top of two), and they work great! I like yours - I didn't think to decorate mine.