Simple, similar in style, tray, to stack up many containers of this model, which i found is extremely easy to print and comes in handy in a lot of situations. I have one set for kitchen spices and another one in my shop in a 50% scale for small bolts and nuts, and i wanted something to hold them all together whilst having them easily reachable by hand. 

I guess it could also be used as a standalone tray, but there's better options for that. Thanks for the original design, @Dust!