If it ain't a backpack, it sure can be used as one today! Motorcycle helmets, cardboard boxes, pots and pans, the world is your oyster. These makeshift carrying cases can be brought around for the day, instead of tucked in the locker like usual. Normal backpacks are out of luck, those still need to be kept in the lockers. Your makeshift carrying apparatuses must be able to handle going up and down the staircases. NO ELEVATOR ACCESS.