What if a cup can keep tab of the calories that you consume and send you an alert when you have had enough alcohol? That would sink a lot of your worries about weight gain and binge drinking as you would know exactly when to put the cup down. A San Francisco-based company Mark One has developed a device that can accurately identify your drink tell you how many calories you are consuming and alert you when it is time to drink again. Called Vessyl the smart cup can be asked to display a particular set of data to