There were two cups on the table. One was laced with drugs. One wasn't. Tyler Confrey-Maloney, co-founder of date-rape drug detecting startup Undercover Colors, says he didn't know which drink was safe prior to taking a sip at a recent board meeting. But what he did know was that a prototype of the nail polish his team is developing could accurately make that determination - at least in a lab. "I put my life on the line," he jokes. Read: Undercover Colors starts lab testing And, according...