Originally posted by SexyChin:
Cognac does not age.
There's no point in keeping cognacs in wine bottles forever. The oxidation process is only forward and not backwards, so the longer you keep, the taste would degrade, but not much. This is unlike red wine in which the oxidation of the alcohol is reversible. Hence, red wine matures with age.
Price is determined by how long the cognac is matured in oak barrels, in which the ranks are VS, VSOP and XO. Some brands such as Remy Martin have their own highest grade in which this case it is the Lousis de Remy Martin.
Just my humble opinions. Correct me when you spot any errors.
also, if you opened the bottle, you face course of nature - eg: evaporation...over time, you'll lose some of the contents.
VSOP and XO stands for something, I don't quite remember VSOP but XO is extra old....VS - typically aged 3yrs, VSOP - 5 yrs, XO - 10 yrs and above. Different houses (or manufacturers) use different years for each category of their cognac but the average age is above. Cognac typically consist of blends of "grape juice" of various age. For example, XO is called XO becos it contains blend of cognac that has been aged 10 yrs, some 8 yrs, some 6 yrs, etc. It does not mean 100% of the juice is aged 10yrs. Hence, the challenge is on the master blender to blend the various stocks of juice year in year out so as to achieve the same blend every bottle - so much so that a drinker won't notice. Its unlike wine where different vintages taste different.
Some prestigious cognac are: Louis XIII, Richard Hennessy, etc....
Since cognac is basically juice, there's really no fixed rule to say, drink with glass or cognac glass or paper cups. Its only a matter of perception. You see uncles swirling their cognac with ice in cognac glass held in their hand, it portray a certain lifestyle - which is precisely what the cognac houses want to market - which directly affect their market positioning. No sane cognac will recommend drinking their product in paper cups but technically or objectively, theres no difference if you drink it from the bottle or paper cup - its a matter of perception.