Recently I bought a 200 ml bottle of Jack Daniel's. I use it for vatting and blending (I have two bottles going comprised of varying quantities of about 10 bottles of Jack Black and about 3 of JD Single Barrel - the vattings are really good, deep, soft and rich - as good as Jack can get).
I noticed that under the black plastic cap is a white liner, it keeps falling out when I open the bottle.
I can't recall another whiskey using this kind of liner although I am sure there are examples.
My question is, why is this used? If I discarded it the black cap would close the bottle just as well.
I think the white cap originally sealed the top (aperture) of the bottle and after initial removal is now sticking to the underside of the cap. Maybe that is the explanation.
But why is it necessary to cover the aperture in this way?
Does anyone know who is familiar with packaging techniques, maybe Bettye Jo?