GridFinity Marker Holder

I'm on a quest to organize my daughter's crafting supplies to stop them ending up all over the table and floor, and have been using GridFinity bins. For the markers I wanted a block that is easy for her to take out of the drawer and set on the table while she's using them and makes it easy to grab the marker she wants and keep them organized.This is designed for 20 Crayola markers. It may fit other brands but I haven't tested it with anything else (the holes are 5/8").The base is a 5x2x5 Gridfinity grid, though the front row of markers does overhang into another row.