Anyone have a favorite diaper bag/bag for multiple kids?

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I’m due with our third baby in January and I have a 4 year old and a 2 year old. They’re both potty trained. I have no idea what kind of diaper bag would be good to use or if I should get some type of big diaper bag/purse to use with multiples? With the 4 year old and 2 year old I always bring an extra couple sets of clothes and underwear incase they have an accident and snacks.