Lightweight foldable backpack. Two side water bottle compartments, one inside zippered pocket, one from zippered pocket. Padded shoulder straps.
I love my narwhal backpack. Mostly for the narwhals, but it's useful too. I visit large campuses a few times a year, and this lightweight bag replaces my purse for the blocks of hiking between parking lots and buildings. I add my wallet and phone to the small, zippered front pocket and stow my notebook, jacket, spare shoes, etc. in the large compartment. It has a side slip-in pocket for a bottle of water, but I wish it had a taller, tighter, slip-in pocket for a phone. My tall phone slips out of the water bottle pocket if the bag gets turned sideways. Love the backpack.