Bottle Nipples

Carissa

So I use Dr. Brown's Natural Flow bottles and was told to get the Preemie flow bottle nipples because the milk comes out in a similar pace as if baby was on the breast. I was wondering as the baby gets older, will the nipple flow change or will they always utilize the same slow flow nipple? I know with formula it changes but I'm a new exclusive pumper, so I'm not sure about this. any thoughts ladies?