I used to abuse caffiene / coffee to an extreme. I had an espresso machine at home, and another in my office, and there were MANY days where was drinking more than 32 oz of espresso in a day. Most of my gastrointestinal issues can be directly attributed to this behavior. I don't suggest this to anyone.

That being said, I still can enjoy cold brew, and my morning ritual is a big tumbler with 1 cup cold brew , 1 cup water, 1 cup oat milk, and ice. That gets me through most days. I also do break it up where i switch to tea for extended periods.