Or, as renowned Canadian economist, Harry Gordon Johnson once said:" The greatest accomplishment of a bartender lies in his ability to exactly suit his customer." Soon, however, those bar staff might not even be human.... Image source, Getty Images Image caption, Should human bar staff be worried?... " She can chat to customers, and when they choose a specific cocktail, she can make it, live." The company says that each unit can be filled with 70 litres of different types of spirits, and that