The use of frozen jars is perfectly acceptable. They have been used by milk banks. When I visited Wake Med's Milk Bank a few years ago, they used glass jars. As long as they are clean and you leave enough head space at the top for expansion (of frozen milk) there should not be a problem.
________________________________
From: "[log in to unmask]" <[log in to unmask]>
To: [log in to unmask]
Sent: Wed, May 12, 2010 9:27:05 AM
Subject: Re: Storing Breastmilk Inexpensively
I do a lot of freezing of fresh foods that I've grown myself. Unless you prevent oxidation by removing air from the bag and using extra thick plastic containers, you will have freezer burn on the surface. The speed is determined by the amount of air passing through the plastic or inside the container. I bought a vacuum/sealing system for my produce and special thick bags. My dil used a brandname bag we won't discuss here and we had acceptable milk 9 months later without freezer burn. Used a straw to suck out oxygen before final seal. The quality of the container needed depends on how long you want to store. Also the speed at which you take the food below freezing and the degree below freezing to stop enzymatic activity.
-----Original Message-----
From: Lactation Information and Discussion [mailto:[log in to unmask]] On Behalf Of Becky Krumwiede
Sent: Thursday, May 06, 2010 11:45 AM
Subject: Re: Storing Breastmilk Inexpensively
I have always been uncomfortable with the idea of freezing breastmilk in regular ice cube trays and then storing the cubes in freezer bags, unless they are going to be used pretty quickly. Freezer burn occurs when air is in contact with frozen food, and ice cubes in bags have many surfaces in contact with the air. I don't really know for sure that freezer burn occurs on frozen liquids, but I know that if I've stored my frozen tomato sauce too long, the surface looks different--I've always assumed it's the same as freezer burn on solid foods. Anyway, what about just regular glass jars - nothing special, just clean jars that other foods have come in? For just about forever I've been telling moms that if they have small clean jars (like from jelly, salsa, etc.) with lids that are air tight, that these make great storage containers. And like the old formula bottles, free.
Becky Krumwiede, RN, IBCLC
Appleton, Wisconsin
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