| 摘要 |
The invention provides in a first aspect a closure ( 10 ) for a passageway such as a bottleneck. The closure ( 10 ) has a concertina element ( 16 ). When the concertina element ( 16 ) is released, the closure ( 10 ) can be removed from the passageway. The concertina element ( 16 ) may have folds ( 18 ), including compressible folds, may be in the form of a spiral. In a further aspect, the invention provides a second aspect a closure ( 110 ), which has a processing ( 132 ). The processing ( 132 ) may include a computer chip ( 134 ), is adapted to receive or convey various types of data, such as characteristics of the contents of the container closed by the closure ( 10 ). The first and second aspects may be combined.
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