You can firmly fix small and unstable nail polish! I would like to introduce the "nail stand" I found at the 100-yen shop "Can Do" because it was convenient.
This product is a nail polish bottle stand with a ring that you can wear on your fingers. Made of soft silicone rubber, you can work smoothly at hand without straining your fingers.
The lower part is a suction cup and can be fixed to a flat surface such as a desk or flooring (it is easy to come off depending on the material, so check if it is firmly fixed). It is also useful when applying pedicure.
A horizontally long bottle is a little cramped, but it was compatible with all the manicures I had at my house. Check it out if you've ever knocked down a bottle! The price is, of course, 100 yen (excluding tax).