anyone face problems with bottles that are off different markings? im using pigeon bottles now but the amount seem to be diff from my avent storage cup..

I was previously pumping with avent storage cups and bottle feeding with pigeon bottles. I never did actually noticed the different markings - what I actually did was to store the breastmilk in the avent cups at 120ml (max) so when I defrost it, I wouldn't have much leftovers to waste. I didn't pay much attention to the amount of breastmilk because my son was feeding on demand. Babies are pretty smart to cry on cue once they are hungry.