A box's inside top lid serves as an excellent space for promotional codes.

STI Group's production lines offer the option of direct placement of a unique code using the folding box adhesive machine. This linking of online activities on the company's home page – or the partner's pages – provides tremendous synergy between advertising effects, and also allows for the campaign's success to be measured down to the click.

"Mit Gigaset dem Urlaub näher" ("Gigaset brings your holiday closer") was the slogan used by Siemens Home and Office Communication Devices in an attractive promotion that used packaging as the central ad medium. The opportunity to convert packaging into an interactive advertising medium – at little to no cost! – provide a powerful draw for creative types.

In the case of Siemens, selected telephone packaging was stamped with a unique code that could be redeemed for € 50 off a travel booking.