MrTattieHeid wrote:High-alcohol fluids like whisky should be stored upright. In a horizontal bottle, the alcohol will eat the cork and ruin the whisky. Some here have suggested turning the bottle occasionally to wet the cork so it doesn't dry out, but as far as I know, no one has done an empirical investigation of the benefits of doing this. If you are storing for a very long time and are worried about evaporation, then maybe some sort of extra seal over the existing one would make you feel better; but I think modern cork-and-capsule seals are probably good enough in most any case.
Tattie - where do you get these horizontal bottles? When you open a horizontal bottle, all the liquid would spill out.
Here's something from the Macallan website:
Bob Dalgarno, Macallan's Whisky Maker, recommends that it is best to store your bottles out of sunlight and in a cool, relatively dry and stable environment.
The bottles can be stored upright as the alcohol vapour in the bottle should be sufficient to moisten the cork and ensure it does not dry out.
Fortunately, given The Macallan's natural wood derived colour during maturation our colour does not fade over time. However, if you store whisky that has been coloured using spirit caramel (E150) you may notice significant lightening of colour. Tests we have done prove that where caramel is added to darken the whiskies colour that some 70% of that added colour will fade if the whisky is stored in sunlight.
The other benefit of storing whisky away from sunlight is to protect the label from bleaching.