When I sat some on the counter to thaw, some of these bags had tiny holes/tears and I lost the milk. I had them stored in the box until use and they were in a separate container in the fridge, so they shouldn't have gotten damaged from how I stored them. 90% were fine but I wont take a chance and use these anymore.

I used these storage bags for breastmilk with my last two babies. The bags are not flimsy and are stand up to use. They work OK with my breast pump. They seal well and the measurements are easy to read. I have also placed these bags in a larger freezer storage bag for future needs.

These bags are excellent quality and the zip lock is so reassuring and doesnt require me to fuss around alot to get the seams lined up. The only downside is the bags are super flimsy and wiggle while you try to pour milk in. This has caused me to spill milk all over my counter as I've been trying to fill the bags up. Love the flat storage and zip lock, as I said though.

You want to be incredibly careful with these. They are very thin and flimsy. When defrosting they WILL leak. It’s best to thaw in a bowl to catch. They freeze flat which is nice but not worth it when it leaks. Parents Choice bags are a far better alternative to these . Medela and Parents Choice bags have been my favorite .

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.

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.

I really like these bags. I have filled them with only a few milliliters up to 6 oz. None have ever broken or leaked. They served us well during my twin pregnancy and now during my baby boy’s breastfeeding journey (almost one year). I can recommend 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 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.