Recently, I've purchased this nail polish made by LA Colors (Color Craze line) from a local dollar store for $1 and let me tell you, this nail polish is AWESOME! The color is vibrant and nail polish stayed on for more than a week without chipping! According to their website, they're also cruelty-free, which means that they do not test on animals. I love this nail polish and the only reason why I took it off was because my nails started growing out and it started to look funny.
This one is NP 416: Radiation.
It only took me 2 coats to get it to be completely opaque!