Abstract: The invention relates to a bottleneck foil consisting of an aluminum foil section provided on at least one side with a special protective layer which comprises 1-40 percent by weight of a binder which is not resistant to alkaline solutions and 60-99 percent by weight of a binder which is resistant to alkaline solutions.

Abstract: Aluminum foil labels for bottles are disclosed which have on both sides a colorless or colored coating provided with an imprint on the outside, if desired, the aluminum foil label being adapted to cover the closure and part of the bottle--neck and to be affixed thereto with the aid of a glue which is soluble in an alkaline cleaning liquor. In accordance with the invention the coating comprises a varnish coating which is insoluble in the alkaline cleaning liquor. The coating can have mutually opposite weak areas which can consist of uncoated stripes. Also disclosed are bottles comprising a bottle body to which is attached such aluminum foil coated on both sides thereof with a varnish coating which is insoluble in an alkaline cleaning liquor. The insoluble varnish coating defines open areas which are opposed from open areas on the opposed insoluble varnish coating.