Yes, it is safe to use because our packaging will protect the broth from the heat.
We use Tetra Pak packaging that is aseptic, sustainable, and environmentally friendly. The main building materials of a Tetra Pak package are a paper carton (wood source), a very thin aluminum foil (that protects the product from oxygen and light), and a thin heat-resistant polymer (from sugarcane).
This thin layer of polymer protects your bone broth from heat. Also, the broth inside the carton is protected from all outside contaminants due to it being vacuum-sealed in the carton, in an aseptic environment. That's why our products have such a long shelf-life unopened.
Just a reminder, store your opened bone broth in the fridge or freeze it if you are not planning to use it within five to seven days.