so I be currently take care of my 4th kid so I know a few thing about freezing milk . we have pack a freezer full of milk for 4 kid now over the past several year . Problem with these bag - when dunk a bag of frozen breast milk into hot water to thaw it out - the bag rip - a small hole will inevitably leak out milk . its happen about 70 % of the time out of the last 30 bag I have have to thaw . absolutely ridiculous . how hard can it be to make a milk storage bag ? the plastic need to be thicker .