Impress your friends wherever you go with the Peugeot Professional Pocket Clef du Vin. This compact yet effective Clef du Vin measures the ageing potential of all varieties of wine. Literally translated to “Key of Wine,” it does just that. If you open a bottle before the wine has matured, you can use the Peugeot Professional to assess its age with its special metal alloy disk. This stainless steel Clef du Vin fits anywhere, whether it’s in your purse or attached to your keychain. Simply fold the special dot on the holder into the handle for easy travel.