Vessyl: this is an amazing technology that’s solving a problem no one has. “What am I drinking?” Read the bottle or can. “How much am I drinking?” Figure out how many ounces your glass is, make a tick mark (|) after each glass, and then multiply the tick marks by the number of ounces. “How many calories am I consuming?” Same thing, but read the bottle or can for the number of calories per serving. I just saved you $99 (preorder) or $199 (later).