Perfect for freezing breast milk
These are very easy to use and doesn't leak thanks to its zip lock feature. It has a self standing feature which I found to be more convenient for freezing as I could take it out and put in in the bottle warmer with ease. The milk bags can be frozen lying flat to save space but it was difficult to warm when the milk was frozen flat. I like how there is a space reserved on the bag for you to mark down when the milk was expressed which assists in sorting out your frozen stash. The only thing I dislike about the bag was that I couldn't transfer every drop of milk into a bottle as the zip lock feature catches a tiny amount of the milk and if you're supply isn't great, every drop counts.