I switched to 1 10-oz cup of black cold-brew coffee per day a couple of years ago. For a few years before that I was doing a 15-oz bottle of standard black coff

I switched to 1 10-oz cup of black cold-brew coffee per day a couple of years ago. For a few years before that I was doing a 15-oz bottle of standard black coffee each morning. Either one seems to work fine for me, to the point that I can pretty much instantly go to sleep whenever I lay down. Before that I was drinking diet soda all day, and I had extreme issues with getting to sleep.