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The Clef du Vin is a little bit of metal which, if immersed in a wine for x seconds, is supposed to make the wine taste x years older. Nowhere on the user guide in five languages which comes with the gadget is there any explanation of the theory behind this, but from what I can make out from www.clef-du-vin.com the idea is that this special, unspecified alloy has been designed, by a team of Frenchmen...