Worked with a guy who would drink 3-5 pots a day while at work. Said he also drank a pot before leaving the house and one when he got home. Had a coffee mug labeled "Coffee Pot To Go" which would, you guess it, hold an entire pot. He still fell asleep at work, sometimes while holding the mug, never spilled a drop though. Kept a coffee maker in his work bench just in case the office one broke.