- How long does non-alcoholic whiskey sour mix last once opened? The precise answer depends to a large extent on storage conditions — keep opened whiskey sour mix refrigerated and tightly closed.
How long does whiskey sour mix last in the refrigerator once opened? Whiskey sour mix that has been continuously refrigerated will keep at best quality for about 4 to 6 months after opening.
Is opened whiskey sour mix 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 whiskey sour mix 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 whiskey sour mix will remain at peak quality.
How can you tell if opened whiskey sour mix is bad or spoiled? If the whiskey sour mix 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