I store my nail polishes in a snapware container with dividers inside. I got the Snapware at Target. The white dividers I got from the dollar store and the clear one I found at my parents' house, but I think it is from Target a few years ago.
The second level is everything else, and it's where the cheaper polishes are. Revlon polishes over on the left. The top bin has Finger Paints and Milani. The bin in the middle has Essence on the left, Sally Hansen in the center, and Sinful Colors on the right. The bottom bin has Claire's and Covergirl on the left, ELF in the center, then Wet n Wild and Maybelline on the right.
These really help me keep my polishes organized. The only issue is that Sephora by OPI and Covergirl polishes are a bit too tall for the lid or other level to fit properly so they have to sit on their sides. I also wish these were available in smaller sizes of the same height or one level at a time.
I have base and topcoats as well as my swatch wheels and nail art supplies in separate, smaller containers. They aren't Snapware but they're a similar idea. I keep polish remover, cotton balls, and all other manicure tools (nail clippers, cuticle pushers, etc) in an open-top bin that I also got at Target.
If anyone is interested, I can take photos of the other bins and do another post. They're not as specifically organized as the polishes so I didn't photograph them originally, but I easily can if you'd like to see. I could also do more specific photos of the actual polishes.
