Our bottles actually fit in the bottle pockets! We use the playtex bag bottles, and they are very tall and very wide, compared to all of the other bottles. I was so excited to see that they actually fit!
One of my favorite things about this bag is the changing pad that comes with it, and the hidden pocket to put it in. I also store my wallet in that pocket for ease of getting it in and out without having to take the backpack off (and because it’s more concealed there, rather than in one of the front pockets).