Purchased this about 7 years ago for a work backpack. I only used it when I traveled. It’s still in great shape and it looks pretty much brand new. There are a couple of very small dirt spots on the bottom of the bag. It will fit a notebook, has 2 inside small pockets on the side and a front zip pocket with a key holder. There are no side pockets to carry a water bottle. It will fit a 13” and 14” notebook. I can’t remember if this is a 25L or 21L, but my gut tells me it’s the 21L. Top of draw string to the bottom is 17”.