I stopped drinking Coffee a few years ago. 1-2 Cold Cokes in the morning, straight on to cold water all day until quiting time, and then bottle 3 until bed.
It's a daily thing for me.
I quit drinking coffee for 3 months and noticed no change in my energy level......so I am back to a pot and a half a day... it is my favorite time of the day...coffee and word puzzles.....then porn and a nap