Art Pen Set Holder

My daughter's art pen set came with no real case, and she was looking for a way to keep them organized so I sketched up this design in CAD and printed it. Turned out nice, and functions well. The extrusions are 100mm deep, which seem to fit both this 56-pen set in particular, but also a few of her other random art pens. Should be pretty easy to scale up or down, as well.