As an expert sommelier and brewer, I can tell you that alcohol, particularly liquor, can change over time as it sits in the bottle. Let's delve into what happens to alcohol the longer it sits.
Unopened liquor, such as whiskey, vodka, rum, or tequila, has an indefinite shelf life. This means that if the bottle remains sealed and stored properly, it can last for years, if not decades. The alcohol content in these spirits acts as a preservative, preventing the growth of bacteria or other microorganisms that could spoil the liquor. However, keep in mind that the taste and quality of the spirit may still degrade over an extended period.
Once you open a bottle of liquor, the clock starts ticking. The exposure to oxygen and light can lead to oxidation, which affects the flavor, aroma, and even the color of the alcohol. The rate at which oxidation occurs depends on various factors like the type of liquor, storage conditions, and the presence of any additives.
Over time, the flavor profile of an opened bottle of liquor can change. It may lose some of its intensity and complexity, becoming smoother or mellowed. However, this doesn't necessarily mean it has gone bad. In fact, many whiskey enthusiasts argue that some bottles improve with oxidation, allowing the flavors to marry and develop more depth.
That being said, it's generally recommended to consume opened liquor within a year or two to enjoy it at its best. After this period, the changes in flavor can become more noticeable, and the quality may start to decline. The spirit may lose its original character, and the taste can become dull or flat. The loss of aroma and color can also be indicators of a deteriorating liquor.
It's important to note that while the flavor may change, liquor doesn't become toxic or undrinkable over time. It's still safe to consume, although the enjoyment may be diminished. However, there are a few exceptions to this rule. Cream liqueurs, due to their dairy content, have a shorter shelf life once opened and should be consumed within a few months.
To maximize the lifespan of an opened bottle of liquor, proper storage is crucial. Keep it away from direct sunlight, as UV rays can accelerate the breakdown of compounds and affect the taste. Ensure the bottle is tightly sealed to minimize the exposure to oxygen, and store it in a cool, dark place.
Unopened liquor has an indefinite shelf life, while opened liquor typically lasts about a year or two before it starts losing its color and flavor. While it doesn't become toxic, the quality and enjoyment may decline over time. It's always best to use a liquor within a reasonable timeframe to fully appreciate its flavors and characteristics.