The best carriers are inexpensive hard sided carriers that open from the top and the front, and can also be taken apart in the middle. (nanuetanimalhospital.com)
To prevent any loss of nutrients and quality of the breast milk, such hard sided containers should be preferred over the bags. (newkidscenter.com)
Even better, it's a lightweight option and comes with a locking, hard sided case, which makes it easier to transport wherever you want to go. (geekwrapped.com)