It is certainly possible. However if you figure that each office worker drinks 2 cups a day at the office, and most don't get Star Bucks more than once per week

It is certainly possible. However if you figure that each office worker drinks 2 cups a day at the office, and most don't get Star Bucks more than once per week, most coffee is still not some crazy sugar consumption. How energy drinks etc fits in here, I don't know.