I have a blue Vans cloth bag. I think it's too big!
Inside I have:
-Oreo cookies only because they happen to be there at work, in fact, I'm going to take them out right now.
-lip balm
-Mickey Mouse wallet. Yes, the kind little kids have, tri-fold with velcro. Very mature.
-glasses and cleaning cloth
-cell phone
-desk keys for work, and 2 flash drives, also for work.
-keys (house/car)
Now, any other day I have my phone and wallet in my back pockets, and my keys in my front pocket and I'm good to go! I hate carrying a purse.

:
But if I have Kaji with me, I have my Kwigy Bo. It's more like a diaper bag! I always have the above mentioned plus
-poop bags
-snack sized ziplock bag with kibble
-a couple of toys
-harness
-retractable and 6ft leash (depends where we're going)
-a hoodie or a tee, if not jammies
-brush for Kaji and hair clips.
and that's it I think.
Oh and water in case Kaji gets thirsty.