OPI GelColor: The label itself should be very well stuck onto the base if you can remove this label easily be wary. Fake bottles seem to be slightly shorter when compared to genuine bottles. Genuine bottles have a finely ribbed base. Many fakes have no ribbed base or the ribbed texture is chunkier (see above photo)

Looking at the nail polish names when I'm picking out a color. Suzi Weiss-Fischmann agrees—and she should know. As the co-founder of O.P.I., the ubiquitous nail polish brand known for its tongue-in-cheek color names, those nail shades called I'm Sooo Swamped! and Teal the Cows Come Home are all her.

OPI stands for Odontorium Products Inc. It was initially founded as a dental supply company in 1981 but later shifted its focus to the nail care industry. Today, OPI is known worldwide for its high-quality nail products and is a leading brand in the professional nail care industry.

Amazon.com: OPI Nail Lacquer, You Don't Know Jacques!, Brown Nail Polish, 0.5 fl oz : Beauty & Personal Care.