Once we are out of stroller age I can't see the need for a large bag anymore. The only thing not baby related in our stroller were sweatshirts or rain slickers. If kids are old enough to walk they can tie their sweatshirts around their waists. I carry a smallish cross body bag for camera, phone, small sunscreen, Chapstick. I don't bring snacks, and would never lug around water bottles when I can get free water in the parks. I am looking forward to when we can ditch the stroller!!