Does Whiskey Go Bad In Flask?
Whiskey can deteriorate if left in a flask for an extended period of time, particularly if it is exposed to sunlight or heat. The alcohol content will slowly evaporate, and the potency of the drink will decrease over time. Additionally, the metallic flask may impart a metallic taste to the whiskey, which can affect its flavor. As a result, it is recommended that whiskey be consumed within a reasonable amount of time after being placed in a flask.