Logan A. Warren of Geek on Call reports the most expensive Starbucks coffee in the world. It took half an hour to make and cost $23.60 (€18).
16 shots of espresso, a shot of soy milk, caramel flavoring, banana puree, strawberry puree, vanilla beans, Matcha powder, protein powder, and a drizzle of caramel and mocha.The resulting beverage contains 1400mg of caffeine. According to Erowid, a widely respected drug catalog, a heavy caffeine dose is 400+mg. This drink has 3 times that. If I drank this all at once, it would put me in the hospital. Two of these would kill me.
(The previous reported title holder, a Venti White Chocolate Mocha ordered by blogger Michael Dolan of CreditCardForum.com cost $20.65)