Coppa dell'Amicizia - Friendship's Cup

This is a traditional cup from the region of Aosta Valley (http://en.wikipedia.org/wiki/Aosta_Valley), North-West of Italy.
Generally made out of wood, but also ceramic, it is used to drink the traditional "Caffè alla Valdostana" (Aostan Coffee), an alcoholic beverage brewed with coffee, grappa, genepy, dried cloves, orange zest, cinnamon and sugar.
Once poured into the cup, sugar is put around the opening and soaked with grappa, then fire is set, in order to burn it dark and sticky. Then th