The Clef du Vin wine aging tool really does age wine! I was a bit skeptical (well, actually, VERY skeptical) when I saw it demonstrated at a show. It’s supposed to “age” a glass of wine by one year for every second you leave the key in the wine. I thought, “Yeah, right, like that’s going to happen”. But, stunningly, in 5 seconds the young red wine tasted like it had 5 more years of age on it!