3D Printer Filament Holder, Plywood and PVC

If there's something we can all agree on, it's that the perfect 3D printer filament holder has yet to be invented. Here is my contribution, and it works well for me. I keep it on the floor directly underneath my printer's intake tube so it is out of the way. It replaces a PVC pipe clamped to the shelf, so it's definitely an upgrade. Bonus, I get my clamp back!
Main box is lasercut out of 1/8" (3mm) plywood and assembled with wood glue. I've made quite a few boxes like this out of thin ply with