This nail polish by Del Sol is so cool! I love painting my nails and when I heard of this nail polish that changes color in the sun I had to try it. I got it and was really surprised how well it worked. The color in the bottle is the color it will be on your nails when you are not outside, but the color on the top is the color it will be in the sun. I am definitely going to buy all different kinds of colors now that I know how it works. I absolutely love this nail polish and recommend it to anyone who paints their nails. I received this product in exchange for my honest, unbiased opinion.