Posted 15 November 2017
There’s a common belief that once bottled, whisky is completely inert. To some degree that’s true – certainly if your bottle is still sealed and stored in optimum conditions. However, once your bottle is open, it is likely to change slowly over time, especially if the level of oxygen in contact with the spirit is quite high. I.E. your bottle is fairly empty. This isn’t a continuation of maturation, that’s all done and dusted before you purchase your whisky, but it is both a reductive and oxidative process, both of which can markedly change the tenor and structure of your whisky over time.