Clef du Vin lets you assess the precise ageability of any wine. When dipped into wine, a patented metal alloy located on the tip of Clef du Vin replicates the key aspects of the natural aging process. The wine’s life will quickly mature along the natural aging curve towards total oxidation. Discover in seconds where your perfect taste is. Harsh, young vintages will become softer and more subtle. Effective only on wines with aging potential. Now you’ll know the ideal moment to enjoy every wine at its peak. Developed and tested over 10 years by one of France’s leading scientists and wine industry consultants and European Champion Sommeliers, Franck Thomas & Giuseppe Vaccarini, Clef du Vin has received wide acclaim throughout Europe and Asia.