An experimental nail polish line called Undercover Colors can do more than color your nails to match those shoes: it can tell if your drink's been spiked by a dubious date. Just pretend to stir the drink with your finger, and the polish will change color the moment it detects GHB, Rohypnol or Xanax (aka date rape drugs or roofies) in the liquid. Pretty cool, right? And certainly useful, seeing as 1.) date rape drugs are typically odorless and tasteless, and 2.) a recent Washington Post report has revealed that sexual assault cases on college campuses continue to grow from year to year.