Design for Chocolate bar packing

The design is for chocolate bar pack to be like envelope shows 1 to 3 post mail stamp on the corner of the envelope and inside the stamp to show pictures of Petra city ( in Jordan ) and the rest of envelope space shows either shadow of the city and the type of chocolate flavor or the designer can creat another designe for same idea. The chocolates bars will be sell majorly on tourist places and duty free shops.