I had to cut back from 4 or 5 cups per day to 2 cups of regular in morning only with cream and 1 sugar & also 2 cups of decaffeinated coffee which don't count in my books.
2 mugs at home, which is my whole Bonavita 5-cup pot before work (I work second shift), and a few times a week I'll have another cup at work of much cheaper coffee...
Weekends its usually just the 2 mugs at home. Too much more caffeine and I honestly feel MORE tired...
I have a 16 oz mug and a 1.5 Liter thermos I haul into work each night. By 0300 both are empty. So, alot....
When I'm not at work though I don't drink much, if any coffee. mostly just water and soda.
I'll make a full French Press every morning (slightly over a litre of water) and it'll be empty by 11am.
Maybe an Aeropress right after lunch if I'm feeling slackish.
Jus g=I only drink coffee in the morning when I get up; usually two 16 oz mugs of regular brewed coffee with a big splash of coffee cream (18%) and a generous amount of demerara sugar. Just going for my second cup now.
I brew five cups every morning at 5:00. I drink one or two at home and the rest goes into a thermos which I finish by 10:00. Occasionally one cup of decaf after dinner.