Mature young wine instantly. Clef du Vin is a scientifically-designed measuring device made from a mix of precious metals. Made for all wines, Clef du Vin, when dipped into a glass of wine, the patented metal alloy on the tip replicates the aging process. It will age the wine one year for each second the alloy is in contact with the wine. Two seconds equals two years from now, three seconds equals three years from now, etc. Take the guesswork out of collecting with this invaluable tool. Developed and tested over 10 years by one of France's leading scientists and wine industry consultants and European Champion Sommelier, Clef du Vin has received wide acclaim throughout Europe and Asia. The individual Pocket Professional is presented in a handsome burgundy leather case for easy traveling to your favorite restaurants, wine shops and tasting!