I can buy the air movement theory except that the stock manufacutuer
recommends refrigeration of unused portions for up to 14 days, so you
could keep 1/2 cup (1/8 of original volume) and 7 1/2 cups of air in the
package for a couple of weeks in the fridge.
Tetra-pak has 4 layers of packing correct? maybe one of the layers
gets ruined by freezing. Perhaps the tetra-pak packaging is
susceptible to punctures in the freezer?
I'm very tempted to phone the broth manufacturer tomorrow. Afterall
the letters are in bold DO NOT FREEZE.
The reason I'm curious is we use this type of stock alot in our cooking
and our baby is about to start eating solid food so I wanna make sure
freezing of this stuff won't spoil the broth and cause some issues with
the wee'un