As anyone who breastfed knows, when it comes to storing your milk, it has to be done right, or it's no good, and extra milk is not easy to make or get (hence why I call it Liquid Gold). I have used many types of milk storage bags, and I have found that by far Lansinoh is my favorite.
These bags are easily readable as to how many ounces each one contains, as they are marked in dark purple. The plastic is thicker than some other bags I've used, which I like, since I have to scald my milk before storing it. It also has a double zipper lock, to make extra sure none of the milk is going anywhere, which makes me feel better since I store the bags lying flat. There's also a place at the top to mark the date and amount, and this also is placed better for storing the bags lying flat. Once you're ready to use the milk, they are designed to make pouring the milk easier, so there are less spills. Every drop counts to a hungry baby!
I highly recommend these bags over others for any mother who is looking for good breast milk storage.