That is Honorable Hammer.....
At my best or worst, for approximately 10 years, I drank (no shit) 3 pots of coffee a day in that decade.
I had a Stanley brand Thermos, that held 1 full pot, plus 2 cups. I would drink it from 4am, to lunch (11am), I'd go home with a 2nd pot already waiting, refill my Thermos, go back to work, and take enough fresh ground beans to work, and make a 3rd pot of coffee at 1 pm (at work). I put 5pm as my cutoff point to stop drinking coffee.
Of course I have had Hypertension since I was 27, 3+ decades ago. Once I retired, I took my watch off my wrist, have NOT worn one since, and went cold turkey with Coffee. The best way I found to replace or rehab from Coffee Caffeine withdrawls, was to wake up to a Cup of Orange Juice, and it was nothing to drink a entire gallon of OJ, in the course of a day. Now, I'll drink no more than 1 or 2 cups of Java, only on morns I have to do something. In other words, it takes me hours to wake up fully functional.