Champagne have been made for special occasions and people, the most notable example perhaps being the 20 fluid ounce / 60 cL. bottle (Imperial pint) made especially for Sir Winston Churchill by Pol Roger. In 2009, a bottle of 1825 Champagne was opened at a ceremony attended by 12 of the world's top wine tasters. This bottle was officially recognised by "Guinness World Records" as the oldest bottle of Champagne in the world. The contents were found to be drinkable, with notes of truffles and caramel in the taste. There are now only two other bottles from the 1825 vintage extant.
Reserve wine youngest vintage, before this blended base wine undergoes second fermentation in bottle to become sparkling Champagne. This aged still wine is called reserve wine, and this practice is meant to ensure that a certain Champagne house's non-vintage product has a consistent style over the years. Since the reserve wine is used in the production process, it is never bottled and sold as it is, but the proportion and age of the reserve wine is often seen as one of the indicators of the quality of a Champagne and the producer's level of ambition. In the Austrian Districtus Austriae Controllatus (DAC)