The milk should be
fresh and properly handled before it is frozen.
It should also be stored in a freezer that maintains an appropriate temperature.
Once milk has been thawed, it should be treated like other perishable refrigerated foods.
If it develops an unusual odor, obvious spoilage, or another concerning change, it should not be consumed simply because it was previously frozen.
The freezer extends storage time; it doesn’t reverse spoilage that has already occurred.
Should You Freeze Milk in the Original Carton?
This depends on the type of container.
If you’re considering freezing milk in its original packaging, remember that liquids expand when they freeze.
A completely full container may not have enough room for that expansion.
This can cause the container to bulge, crack, or leak.