Craft Room Organization - Markers, Pen, etc.

I have numerous types and colors of pens, markers, pencils, etc......what creative person doesn't.  I am the out of sight out of mind type of person, so I had to come up with a way to have all my pens visible and within reach.  I have of the rotating carousel that holds all my essential tools and such but it hold everything vertical.  As an artist I own various expensive art markers which i use a lot even in my paper projects.  They have to be stored vertical.  So I had the idea to use coffee mugs on a mug rack.  Would you believe that when i went looking for a mug rack, it was the hardest thing to find.  The above mug rack was found at my local Ross.  To my surprise the mugs were colored and perfect to keep my rainbow of a collection separated.