I had been trying to find premade nail polish holders and couldn't find ones that fit so made my own.
These are designed to fit nail polish bottles from ORLY but many others will also fit as well.
I am also including a single slot test fit model so that you don't have to print an entire tray just to find that it doesn't meet your needs to save material.
Designs were done in solidworks.
The author marked this model as their own original creation.