Essentials Diaper Bag by JJ Cole
This bag is great for running errands with your baby. I use it even more now that my twins are older, and I no longer have to carry around the baby section of Target with me. It can carry a bottle (in an insulated pouch that is removable), diapers, a onesie, wipes, car keys, your wallet, make-up and still have room for other stuff. It carries more than it looks and is very comfortable to wear.