As an expert sommelier and brewer, I can confidently say that rum does not go bad after 20 years if it is stored properly. Rum is a distilled liquor made from sugarcane byproducts such as molasses or sugarcane juice. It has a high alcohol by volume (ABV) content, typically ranging from 40% to 60%, which acts as a preservative and helps to maintain its flavor and integrity over time.
When it comes to storing rum, there are a few key factors to consider. First and foremost, it is important to keep the rum away from direct sunlight. UV rays can degrade the quality of the rum and affect its flavor profile. So, storing it in a cool and dark place, such as a cellar or a cupboard, is ideal.
Temperature fluctuations should also be avoided, as they can cause the rum to expand and contract, potentially leading to leakage or spoilage. Keeping the rum in a consistently cool setting will help to maintain its stability and prevent any potential damage to the bottle.
Another important aspect of rum storage is ensuring the bottle is tightly sealed. The cork or cap should be intact and properly sealed to prevent any air from entering the bottle. Exposure to air can lead to oxidation, which can negatively impact the flavor of the rum.
It is worth mentioning that unopened rum can be stored almost indefinitely if these storage conditions are met. However, once a bottle of rum is opened, its shelf life will be significantly reduced. Exposure to oxygen and the gradual evaporation of alcohol can alter the flavor profile and overall quality of the rum over time.
Personal experience has taught me that some rum enthusiasts prefer to decant their rum into smaller bottles after opening to minimize the amount of air in contact with the liquid. This can help to extend the shelf life and preserve the flavors for a longer period.
If kept out of direct sunlight and in a cool setting, unopened rum can be stored almost indefinitely. Its high ABV content acts as a preservative, ensuring its stability and integrity while in storage. However, once opened, the shelf life of rum will be reduced, and it is recommended to consume it within a reasonable timeframe to fully enjoy its flavors and characteristics.