I stored bone broth in the freezer by filling mason jars 3/4 to the top, till one day a thawing jar cracked and embedded tiny slivers of glass in the broth. Major bummer. But the mishap opened up the possibility of a better alternative.
Pouring cooled broth into silicone baking cups (related post: helpful kitchen gadgets) and freezing them for a few hours results in broth that runs no risk of shattering glass. The compact broth-cups have the advantage of quick accessibility and can be stored in a variety of container shapes to accommodate the most crowded freezer.