I saw that zpacks sells a bottle holder designed to attach to your shoulder straps, holding a bottle of water there for easy access. I typically drink from water bladder but also like to have option for grabbing a bottle. My pack's access to the bottle pocket is a PITA, can't quite reach it and get it back in very easily. It seems like the zpacks idea is good but I worry that it would be bouncing a lot and be annoying? Any experiences with this would be appreciated.