My girlfriend had all of her nail polish in a small little basket with no organization so I made this for her.
The reason it is small is because my 3D printer is limited to 120x120 mm so I had to make something of that size. The great thing is that you can print out multiple ones and have them sit next to each other to hold more nail polish.
It can fit 2-3 nail polishes on each shelf.
Note: I made this model in about a half hour using Microsoft's 3D Builder so it is definitely not perfect, but gets the job done.
Monoprice Select Mini 3D Printer
Feel free to mess with the Infill and Resolution settings with what works best for you.
If printing on a Monoprice Select Mini 3D Printer, make sure to scale the model down to 99% (I accidentally made it still a bit big for the build plate.)