Imagine all the benefits of coffee without the worry of stains. Well, check this one off your list: We now have the world’s first colorless coffee beverage. (And you didn’t think technology was moving fast enough.) The beverage, CLR CFF, was developed by Slovakian brothers David and Adam Nagy while they were living in London. “We are heavy coffee drinkers,” Adam tells London’s Evening Standard. “Like many other people we struggled with the teeth stains caused by it. There was nothing on the market that would suit our needs so we decided to create our own recipe. “Because of the hectic lifestyle we lead, we wanted to make a refreshing ready-to-drink coffee which provides the boost but is low in calories.” Of course, just as important as keeping up their caffeine intake — the colorless drink will help a lot of us not waste the money we spend on keeping our pearly…