- How long does triple sec last? The answer to that question is a matter of quality, not safety, assuming proper storage conditions - when properly stored, a bottle of triple sec has an indefinite shelf life, even after it has been opened.
To maximize the shelf life of triple sec for quality purposes, store in a cool dry area away from direct heat or sunlight; keep tightly closed when not in use.
Once a bottle of triple sec is opened, the contents may begin to evaporate slowly and some flavor may be lost over time, but the triple sec will remain safe to consume if it has been stored properly.
How to tell if triple sec has gone bad? The shelf life of triple sec is indefinite, but if triple sec develops an off odor, flavor or appearance, it should be discarded for quality purposes.
Sources: For details about data sources used for food storage information, please click here