Storing small quantities in plastic bags place in a larger container is
probably the most economical system space-wise.  However, more secretory
IgA and fat is lost this way than when storing in rigid glass or plastic
containers.  It may not be wise to store in large quantities since she
may only need small amounts, especially if only one baby needs
supplements (and as Dr. Jack has stated, none may need them--however,
mom might want or need to spend a few hours away from one or all of the
babies at some point in time).  Once the milk is thawed, it can only be
used for 24-hours.  Small square freezer containers might be practical
for some of the milk since there is a greater chance that she would use
larger quantities than a singleton mom.  However, I'm not sure about the
plastic used in these bottles as compared to other containers that have
been studied.

Bonnie Jones, RN, ICCE, IBCLC
from the sunny S.W. USA