If your recycler takes old oil jugs it is much more of an exception than a rule. Of course, my “recycler” will “take” them. They just won’t recycle them. So - maybe yours too are going to the landfill via your recycler.
How does one “guarantee” the pureness of oil currently? I’m not sure what’s different. A little plastic ring on the cap or a foil seal guarantees pureness for you?
Ok - well then I suppose every “barrel” can have its security seal. You can check it if you want to at the store - is that the question?
There are logistics that would obviously need to be worked out. I don’t think of that one as a very hard one.