Shrink capsules, or shrink capsules or aluminium capsules
Shrink capsules, or shrink capsules or aluminium capsules are terms used in viticulture, and consist of a shrink film or aluminium, shrink capsules shrink when heated
and are thus adjusted to the bottle neck, aluminium capsules, however, are rolled on with a capsuler.
The purpose was to have an exclusive design for the product, furthermore you can see roughly whether the bottle was manipulated.