A commentator who calls him or herself simply UofCer reveals:
After we took a couple classes with Jacob Levy, a friend of mine made a facebook group: 18 million milligrams of caffeine with Jacob Levy. Every day he would walk in, set two cans of Diet Coke on the table and promptly begin lecturing without notes. If there were more than two cans, you could be certain you'd be late for whatever you had next.
Someone-- I suspect it was one of the architects of this group-- once asked me why it was Diet Coke rather than coffee, given my known proclivities.
The answer: On my way to class, I need my hands free to carry books. And it's dangerous to walk around with a cup of coffee in each of your sports jacket pockets. Two cans of soda will roughly get me through an hour and twenty minutes of talking-- after which time I can go get a proper cup of coffee.
Update: Phoebe Maltz enjoys the black ambrosia, too. In response to people who criticize the money spent, she observes, "If you consider the accused lattes to be a replacement for the three martinis our generation is not having at lunch, and the two packs of cigarettes our generation is not having throughout the day, it looks a bit different."