I made 9-patches for the inside pockets. and a 4-patch outer pocket for the cell phone and keys. Designing it piecemeal is a pain. I added the pocket on the end for a water bottle after it was mostly made so had to do most of it by hand.
After using it for a day I realized it needed a clasp so added this magnetic snap. Some of my favorite fabric in the strips ended up on the UNDER side of the snaps; I'd thought the snap would be upside down and the brightest fabric that I'd chosen to not show, do show.
It'll hold a bunch of stuff! The kitchen sink comes to mind.