From the consumer perspective, packaging also plays a major role when products are purchased: packaging is crucial, given that it is the first thing that the public sees before making the final decision to buy (Vidales Giovannetti, 1995). This function has increased with the arrival and popularisation of self‐service sales systems which have caused packaging to move to the foreground in attracting attention and causing a purchase. Prior to this, it had remained behind the counter and only the sales attendant came between the consumer and the product (Cervera Fantoni, 2003). According to Sonsino (1990), self‐service has transferred the role of informing the customer from the sales assistant to advertising and to packaging. This is why packaging has been called the “silent salesman”, as it informs us of the qualities and benefits that we are going to obtain if we consume a certain product (Vidales Giovannetti, 1995).