My dear, sweet and wonderful husband made this unit for me. I have been needing storage for awhile but haven't been able to find exactly what I wanted anywhere. Some units were close, but nothing that was completely what I wanted. So my husband and I sat down and designed this peice and he built it for me. For the marker storage, I liked the Xcubes that are sold at Office Depot but I wanted something that matched my ink storage so my husband built these boxes. There are 8 seperate boxes that can be put in any configuration and don't have to be next to the ink storage unit or even next to eachother. But I like it better that way. The drawers on the bottom hold my ink refills but can hold other things as well. I just chose to put my refills in there. I absolutely love how this turned out. It's better then I imagined.