The shelf life of Newman's Own products can vary depending on the specific item. Generally, most Newman's Own products, such as sauces, dressings, and snacks, have a shelf life ranging from one to two years when stored unopened and in a cool, dry place. Once opened, it is important to follow the storage instructions provided on the packaging, as many products may need to be refrigerated and used within a certain period to maintain freshness and quality. Additionally, Newman's Own often provides a "best by" date on the packaging, which indicates the date up until which the product is expected to remain at its best quality. For specific information about shelf life and storage for a particular Newman's Own product, it may be helpful to check the packaging or visit their official website for the most accurate details.