What is the best diaper bag for a 1 year old and Newborn so I don't lug extra stuff around when it…

What is the best diaper bag for a 1 year old and Newborn so I don't lug extra stuff around when it comes time? My carter's one and Coach bag I feel won't be big enough. Like I already stuff my son's right now and him by himself takes up damn near a whole bag. And my coach one definitely isn't big enough.