You can use a microwave to get it from freezer temperature to slightly warm. (veganbaking.net)
The organic bone broth can be kept in the freezer for 6 to 9 months, according to production date, when freezer temperature is set at zero or below. (wisechoicemarket.com)
We had a few days of respite from the cold but it's back to below freezer temperature again. (gracefully50.com)