During my time as a Starbucks barista, I thought I had seen it all – snarky customers, massive spills – but this one truly takes the cake. In a recent Reddit thread, a barista shared an absolutely diabolical coffee order their cafe received, and the most accurate way I can describe the drink is, well, undrinkable. Many Starbucks customers request customizations to their beverages, but this insane sip was customized to the point of chaos – and it sent the worker into a (pretty hilarious) spira...