Saddle bag Ranger 2.0 Large – Speedsleev
Contains all my “technical” stuff. The jersey is for jacket, phone and third water bottle. I just do not care about being right or wrong in terms of aesthetic- if I do not have tools, spare tube, or enough fuel and stand on the side of the road hopelessly waiting for uber or lying on the ground bonking, look of my bike does nothing for me. Not to mention that me, as a person, is not aesthetically pleasant enough to care about “rules” of cycling 
Use whatever you find useful and works for you.