How to Select and Store
If possible, purchase raisins that are sold in bulk or in transparent containers so that you can judge their quality, checking to see that they are moist and undamaged. When buying raisins in a sealed, opaque container, make sure that the container is tightly sealed and that they are produced or packaged by a reputable company.
Storing raisins in the refrigerator in an airtight container will extend their freshness and prevent them from becoming dried out. If you purchase raisins in single serving boxes and do not want to transfer them to another container, store the boxes in the refrigerator to extend their shelf life. Raisins will be the most fresh if consumed within six months.