This is a simple model to mount plastic wrap and aluminum foil boxes to the bottom of a shelf. I needed a way to organize mine and keep them from taking up valuable pantry shelf space and I couldn't find a similar model that was big enough. I added a bar across the length of the bottom oval so undersized boxes could also be used. It is open at each end so any length box can fit. Designed to fit boxes up to 74mm x 74mm. You might be able to squeeze a 75mm square box, but it will be tight. Edges all have a 1mm fillet just to smooth out the model and reduce inner corner stress. Since I am mounting this to the bottom of a wooden shelf, I added countersunk screw holes in the mounting tabs for regular drywall screws. You could probably use 3M strips as well, but I haven't tried. I'm not very good with Fusion 360 so this is a very simple model. PLA is fine since it doesn't need to be super strong or anything. I printed it with the side with the bar across the oval on the bottom. Let me know if you have any suggestions, I just started messing around with Fusion 360 and this is one of the first things I've ever designed.