I've purchased and repurchased these bags only to find out they aren't the best. As I needed to start using the milk, I would noticed that a lot of the bags would leak as they would thaw out. That is so frustrating to see the wasted milk. Completely disappointed in this product, definitely wouldn't/didn't repurchase.

These work okay, unfortunately the last time I purchased I got a few leaky bags that weren't able to tolerate the freezer. But I like the size of these, I can easily put in over my flanges without needing an adapter. However if you're transferring or by chance leave it on the counter for a second without sealing it there's a good chance it will fall over. I've lost quite a bit of milk this way.

I use these bags to hold pumped breastmilk in the freezer. I have not had any problems with the bags' integrity holding up to various temperature conditions. I don’t, however, defrost the milk in the microwave, which is not recommended anyway (creates hot spots in milk), so I wouldn’t know how well the bags would do in that situation. I've only held frozen milk in these bags for about a month at a time before I would need to make a bottle for hubby to feed the baby. Breast milk can be frozen for up to 6 months, so I would need to do an experiment to see how well the bags holds up. My only concern is when pouring the milk from the bag into a bottle, I need to be careful of where the milk touches the non-sanitized part of the bag's opening. I tend to wash the opening flaps first before opening the bag. Lastly, knowing how much milk is being stored in the bag is better determined by a baby's bottle set on an even flat surface. The level read on the bottle is always different than the level read on the bag.

i love this product because it makes storing breast milk so much easier. it is space saving in the freezer than trying to find bottles that don't take up a bunch of space. seals great and you can record the time date and everything on the bags when you pump.

I have tried about 5 different storage bags. This bag is by far the best bag I've tried. (I need to thank my buddy again for recommending this!). I love the double seal. I haven't had to worry about leakage with these. Plus, these bags TRULY freeze flat! Used in conjunction with a breast milk storage organizer, I am able to build a good supply for when I return to work AND leave room in my freezer for actual food.

These bags store a lot and I like that they are BPA free. I have used about 100 of them and have not had a bag leak or break when I was thawing. It is a little tricky at first to pour them into bottles, that is something my significant other has problems with and has lead to a lot of spilled milk. The only thing I do not like about these is the pouring issue. Other than that, no complaints and I will continue to buy these.

I’d give zero stars if I could. I’m so frustrated with these milk storage bags as they continue to all leak. I’ve just started to thaw out the freezer milk since returning back to work from maternity leave and almost every one that I’ve thawed out has leaked everywhere like this! I have worked too hard trying to save a good freezer full of milk, now SO much has gone to waste.

I freeze two bags per day, and these are the best. Double zipper is great, but the best aspect is the shape. They don't stand on their own, but I know no mommas who would trust their milk to a self standing bag anyway! The shape is perfect to freeze flat for evenly shaped milk. I tried the fancy pump-brand bags, but I always return to these. Great gift, btw. Love them!

We like these bags as they don't damage easily. We tried others and when defrosting the milk it had holes in the bags and the milk leaked everywhere (super upsetting) and we haven't had that happened with these. Only negative we have is they are not as easy to pour the milk out when trying to pour directly into a bottle.

I've been using these for months with only one single bag developing a hole in it while thawing on a bowl of warm water. Otherwise zero issue with them. the directions say to fill them up to 6 oz but 6 1/2 hasnt been a problem for me. It is best however to freeze in smaller increments to have the exact amount you need without waste. The more plump filled bags also have more wasted air space between them when put together into a gallon size freezer bag block of breastmilk bags. They thaw and warm very fast- much faster than a bottle. In the early days id actually pour my milk into the bags just to warm it faster to serve to baby. You can pump directly into the bag but i found that the bags can become crooked without noticing and spill your milk while pumping so it didn't work well for me. Still nice its an option if you forget a bottle and need to empty your breasts on the go. They fit perfectly in a flat bottom freezer bag and keep well when freezer bags are doubled up. i use a permanent marker pen to write on them and it stays on perfectly. I wont be using any other kind.