I carry a sponge (cut in half) and small bottle of dish soap with me in my lunch bag to wash my dishes with after lunch at work. I needed a small box to carry the sponge in that was well-ventilated enough to allow it to dry without getting moldy. The boxes should fit over each other snugly but can be scaled as needed (be sure to check the dimensions to make sure they fit!). I had to sand the outside of the bottom so the ridges from the layers wouldn't grip too tightly to the lid but it fits well and stays shut.
The lid and box can both be printed together on a Prusa MINI+ print bed with the provided gcode.
No supports or rafts needed.
The author hasn't provided the model origin yet.