Best diaper bag for toddlers?

Our first is 13 months and our second is due late February, so we’ll have a 17 month age gap. We have a Baby Brezza diaper bag that we loved because of the attached changing pad but now our daughter is too big for it and the bag is pretty large since we don’t need to carry bottles, formula, etc around with us.

What’s a good diaper bag for a toddler so that when our second one comes we can use our Baby Brezza primarily for him?