i use the backpack while  walking my dog. i stash all her needs, water, treats, poop bags etc. its just large enough with out being too cumbersome.

I love this bag!  It has surprisingly a lot of space but doesn't look bulky.  I used it as my main bag when I broke my foot and had to  be able to carry my things!  I just wish it had one more pocket on the outside of the bag, but overall a  great bag!