Ameda/Egnell manufactures freezing bags specifically designed for freezing
breast milk.  Unlike standard bottle liners, they are constructed of
multiple layers which protect against freezer-burn, and they will not crack
or split open in the freezer.  These layers also form a unique odor barrier
which greatly reduces the permeation of odors into breast milk from other
(far less precious!) items in the freezer.  For more information, please
e-mail me privately.

Regards,
Roland Muller
Ameda/Egnell Corporation