All Bertolli products are stamped with a code, which will help identify the best before date of that product.
For example, if the code on the product is 2012 JN 30 L9126T H1335, then the best before date can be found in the first 8 digits in the form YYYY MM DD. In this case, the best before date is June 30, 2012.
Bertolli Originale and Gentile Extra Virgin Olive Oils have a shelf life of 18 months from the date of bottling. Bertolli Classico Olive Oil and Delicato Extra Light Tasting Olive Oil are best before 20 months from the date of bottling. Bertolli vinegars have a shelf life of 36 months from bottling time.