Backpack diaper bag for two

My toddler will be almost 3 when our second arrives and she’s recently potty trained so not much needed for her. However, I’m looking for a high quality diaper bag that can hold everything (I’m an overpacker). I really like Freshly Picked classic bag but the snaps on my mini don’t stay closed and it drives me crazy. I’m looking at the boxy backpack from Petunia Picklebottom but I haven’t seen an inside picture so not sure about that one either. I need something that will hold up for a while! What’s your favorite diaper bag??