i should think of the titles first

What's the human limit for caffeine intake in one day? I am looking to get JUST up to that point. I am tired something fierce. Tired like falling asleep at my desk tired. That is bad. Due to the configuration of my cube, I get a lot of foot traffic coming behind me AND facing my monitor. Everyone on his floor has caught me reading blogs, checking CBS sportsline, watching YouTube and being generally unproductive. Actually, I think the dead giveaway that I'm working is if I'm wearing headphones. If I'm not, I may be working, or I may be sitting in my cube listening for footsteps. Because of this predicament, I can distinguish almost everyone on the floor by how they walk. Maybe not perfectly, but I can usually narrow it down to 2 - 3 people. This, while exceedingly cool, is a completely worthless skill - so far as I have determined. Therefore I am grateful to possess it.

So, I am enjoying a bottle of Arizona Diet Green Tea with GINSENG. I made sure I got the bottle with ginseng in all caps because that means it's extra powerful. It is really in all caps and there's a couple of geishas on the bottle. One geisha is playing a shamisen (google is smart), the other looks like she just said, "You go girl!" There's a third geisha, not part of the aforementioned scene, who looks to be making a cellphone call. Oh shit. My phone's ringing.