Kind of an odd topic for A'gon. I am not sure why any scotch would require a decanter. Decanting wine or port serves two purposes. First, if there is sediment in the bottle, decanting separates the liquid from the sediment so one is not drinking sediment. Second, decanting hastens the breathing process by virtue of the physical act of pouring the liquid into the decanter. Also, wine will tend to breathe more quickly in a decanter as most decanters are designed in a shape that allows the wine to be exposed to more air than if it was left in the bottle.
