Does a baby poop in their diapers,YES.Of course all babies need a diaper bag when going out away from home.I carry a Pink nursery printed one.In it I carry my extra binkys,my Johnsons baby powder,my Desitin diaper rash ointment.My extra bottle,and container of dry FORMULA.I also carry 4-5 pink cloth diapers,2 pairs of rumba pink plastic panties.Diaper pins,and a pink nursery printed plastic coated changing pad.I also carry and extra onsie,just in case the one I am wearing gets wet,if my diapers leak.I also carry a zip lock plastic bag,to put my dirty things into(if need be).