- How long does grenadine last once opened? The precise answer depends to a large extent on storage conditions — keep opened grenadine refrigerated and tightly closed.
How long does grenadine last in the refrigerator once opened? Grenadine that has been continuously refrigerated will keep at best quality for about 4 to 6 months after opening.
Is opened grenadine safe to drink after the "expiration" date on the bottle? Yes, provided it is properly stored, the bottle is undamaged and there is no sign of spoilage (see below) - commercially packaged grenadine will typically carry a " Best By," "Best if Used By," "Best Before", or "Best When Used By" date but this is not a safety date, it is the manufacturer's estimate of how long the grenadine will remain at peak quality.
How can you tell if opened grenadine is bad or spoiled? If the grenadine develops an off odor, flavor or appearance it should be discarded.
Sources: For details about data sources used for food storage information, please click here