How long does an opened bottle of liquer last?

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Montgomery
@Montgomery
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A liqueur?


How long does Irish Cream last

Each bottle should have a —best by?? date on the label and that's a pretty good starting point. In most cases irish cream, provided the bottle is unopened, should be fine for at least two years after bottling. Of course it won't go bad a day or two after that date, but the longer you store it, the worse its quality will be. And, eventually, it will go bad. It's difficult to determine how long it can be stored before going bad, because it depends on both storing conditions and the liqueur itself. Just remember that it should be drunk early, as its quality slowly deteriorates over time. After opening the bottle, it's said that the alcohol should be fine for about half a year, maybe a little longer. Of course if you won't refrigerate it, in most cases it will go bad before the half-year mark.
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If you meant Liquor


How To Deal With An Opened Bottle Of Whiskey

As long as the whiskey stays unopened and is stored properly, it's won't go bad for long years. Once it's opened, it's exposed to oxygen, which also causes some changes in taste. While the bottle has a high level of whiskey, the oxygen isn't an issue. It probably won't change the taste in years. When the level of the liquid gets lower, the pace at which the taste alters rises. There are, however, some ways to avoid the oxidation problem. The easiest way is to pour the alcohol in smaller bottles, so there isn't much room for air in the bottle. Another way is to utilize marbles — you can push up the volume of the alcohol using them.



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truecap
@truecap
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Posted by Montgomery
A liqueur?


How long does Irish Cream last

Each bottle should have a —best by?? date on the label and that's a pretty good starting point. In most cases irish cream, provided the bottle is unopened, should be fine for at least two years after bottling. Of course it won't go bad a day or two after that date, but the longer you store it, the worse its quality will be. And, eventually, it will go bad. It's difficult to determine how long it can be stored before going bad, because it depends on both storing conditions and the liqueur itself. Just remember that it should be drunk early, as its quality slowly deteriorates over time. After opening the bottle, it's said that the alcohol should be fine for about half a year, maybe a little longer. Of course if you won't refrigerate it, in most cases it will go bad before the half-year mark.
.........



If you meant Liquor


How To Deal With An Opened Bottle Of Whiskey

As long as the whiskey stays unopened and is stored properly, it's won't go bad for long years. Once it's opened, it's exposed to oxygen, which also causes some changes in taste. While the bottle has a high level of whiskey, the oxygen isn't an issue. It probably won't change the taste in years. When the level of the liquid gets lower, the pace at which the taste alters rises. There are, however, some ways to avoid the oxidation problem. The easiest way is to pour the alcohol in smaller bottles, so there isn't much room for air in the bottle. Another way is to utilize marbles — you can push up the volume of the alcohol using them.



Doesitgobad.com LINK.



Both actually.