When it comes to storing opened rum cream, the expiration date may vary depending on the brand. Generally speaking, unopened bottles of rum cream can last up to two years when kept in a cool and dry spot away from direct sunlight. When opened, however, you will want to enjoy your rum cream within six months for optimal freshness.
The key for maintaining optimal quality when storing an opened bottle is making sure that the lid and cap are tightly sealed after every use. This will help avoid rapid oxidation of the alcohol. Furthermore, as temperature fluctuations can cause spoilage over time and decrease the shelf life of your bottle, make sure you store it in an area where temperatures remain relatively consistent (i.e., not near a window or on top of a refrigerator). Refrigerating your rum cream can also help preserve its flavor!