Stacking 60ml Paint Rack

Stackable paint rack for 60ml Apple Barrel and Folk Art paints. 

This is inspired by another design I cannot find anywhere, however, it is built entirely from scratch in tinkercad. 

I tried for a minimalist design to get the most bang for your buck. 

Holds itself together under the weight of the bottles. Will need to be attached to the wall if you plan to go much more than a half dozen shelves high.