Saving the Empties

I am musing over making maple syrup vinegar this spring.  I am still undecided since I've read homemade vinegars may not have a high enough ph to use it in canning.  If I were to make a vinegar, it is recommended to use it as a dressing or marinade.  Reading these opinions does make me wonder how our grandmothers and grandfathers knew the vinegars they made were safe for canning . . .

Either way, I'll be ready as I've been saving empty juice containers for making vinegars or just for water storage for emergency preparedness. 

The other benefit to empty bottles . . . I've started taking a new juice and pouring half into an empty bottle the topping both off with tap water.  Just doubled my inventory and with how sweet these juices are to start with, the diluted versions are okay.