I have a very nice bag that I keep all of my gym stuff in, however it is very large and heavy to carry and it's not a Bihn bag! I would like to have a much more minimalist gym bag and I am wondering if the ID would work. My present bag is 2745 cu in (as big as an Aeronaut) and will not fit into the lockers. The ID, being smaller and more flat in its form, should fit into a locker easily, as well as having a water bottle pocket. What do you all think ???