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.
Powdered creamer is usually corn syrup solids, others vary. I personally just add a splash of milk to my coffee and sweeten slightly with Splenda (I’m T2 diabetic, no sugar).