Four university students have invented a nail polish that not only looks pretty, but doubles as a discreet date rape drug detector. The polish, called Undercover Colors, has the ability to detect common date rape drugs Rohypnol, GHB and Xanax. Women who wear the polish simply stir their drink with their finger and if a drug is detected, the polish changes color.

The North Carolina University chemistry students said they were inspired to invent the product after learning an estimated one in five American women will be sexually assaulted in their lifetime. “While date rape drugs are…