I like espressos (especially mochas) but they take a bit of work to prepare a single cup. With drip brew, I can do very little and get unhealthy amounts of caffeination into my corpse. Also, I pour ungodly amounts of creamer into my coffee. That Mason jar is quite literally half coffee half creamer.
Idk how you are estimating the “coffee equivalent”, but I’ve found that the generic caffeine estimates for a cup of coffee are too low.
Would recommend looking up how much caffeine is in the amount of beans you use. Caffeine extraction is practically 100% in water.
I think typical estimate is 90-100 mg caffeine in a cup of coffee. With my coffee/water ratio, I think it was ~20% higher. And then the mug I use was much much bigger than a “cup”.