1. A method for identifying and tracking a reusable packing crate for carrying products, the method comprising the steps of: a) applying an identifier code on at least one sidewall of the crate by producing a two-dimensional barcode pattern through the at least one sidewall; b) reading the identifier code; c) storing the identifier code in a computerized database; d) storing data relating to the crate and the products contained therein on the database; and e) associating the stored data with the identifier code.