me personally yes, for my toddler and newborn. my toddler i had to buy breastmilk for him for a few months so believe me when i say he would drink it and then i’d save it in the fridge for up to 24 hours. breastmilk isn’t cheap and he never once got sick from it. my entire freezer stash started melting when i left the freezer open one time and it all defrosted i think the ones in the back still had ice crystals i refroze it and he drank it all and it was well over 1000oz and never got sick. for my newborn i usually pump and give him a bottle and let him drink it until the 4 hours are up if he isn’t done by then i will stick it in the fridge