The amazing Clef du Vin wine aging element is at work here. Clef du Vin replicates key elements of the wine aging process at an accelerated rate of one year per second. Dip the Clef du Vin into the wine glass at 1-2 second intervals. 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.