The Nathan Exoshot 2 water bottle fits perfectly in the pocket on the shoulder strap of running hydration packs like the Nathan 2.0 Quickstart so that you can bring extra water or liquid nutrition on yours runs.
The Nathan Exoshot 2 is also easily grab-able for a quick swig while you're running at your pace. When you're done running, it serves as an extra space when having coffee with friends or a useful place to stash your top so that you're not sitting in a sweaty t-shirt.