The Glenlivet Cellar Collection - from the oldest licensed distillery in Scotland.

Whisky is stored in old wine and sherry casks for up to 50 years.
With evaporation however at possibly 22% after five years, it helps to explain why old whisky is extremely expensive, as after twenty years there are only a few bottles left in a 480 litre Butt. So there is likely to be very little left in the 1959 casks in this image...