To receive the San Marzano designation, tomatoes must be grown in Italy's Campania region, within one of the 41 approved municipalities, the main ones being Agro Sarnese-Nocerino, Acerrano-Nolano, Pompeiana-Stabiese and Montorese. The unique taste of San Marzano tomatoes comes from a specific terroir exclusive to the volcanic lands at the foot of the Vesuvio, blessed with a mild Mediterranean climate. The code printed on the lid provides information about the harvest: it includes a company identifier (our producer), a letter (determined by Italy's Ministry of Economic Development to indicate the year of the harvest) and a series of 3 digits representing the date of production.