How does one know if slightly crushed tetrapaks are safe to eat from? I have never heard of problems from them but wonder as they get a bit crushed from picking them up repeatedly. This article How to Know if Canned Food is Safe Past its Best Before Date says to avoid package if it is cracked, crimped or pinched but perhaps that applies to cans? Thanks!
It depends on the damage to its layers.
Now, obviously the container should not be considered safe if layers 1-3 are compromised. But small damage in layers 4-6 should not be considered invalidating.
Since the package is flexible, I don't think that slight crushing compromises any of the more important layers.