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Alternative bottle stopper developed in Australia, first presented to the public in 2004. It consists of the three parts sealing cap, film and piston. From polyethylene manufactured cap encloses the bottle neck. The aluminum foil (like a screw cap ) is welded inside the cap and prevents oxygen supply. The flask, also made of polyethylene, is attached to the inside of the bottle and extends into the bottle neck like a stopper. Only this flask welded to the film is in contact with the wine. The piston material was from AWRI (Australian Wine Research Institute) tested and shows no negative effects on the wine. All materials have been approved by the American FDA (Food and Drug Administration) and the EU. Polyethylene is one of the purest types of polymers and has been used in the food and beverage packaging industry for many years. The lower part of the cap consists of a tear-off tape wrapped in a spiral around the neck, with which the closure is released and removed with a “pop”. A 12-month test series showed that the breakdown of sulfur dioxide slower than with plastic corks, but faster than with screw caps or natural corks. See also under closures,

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