How found: If you allow the bomb bag robbery to occur and give Kafei the letter, go back to Kafei's place on the final afternoon. The owner of the curiosity shop will give you the express mail to Mama.

    How used: Either give it to the Postman to deliver -- which will net you the Postman's Hat -- or deliver personally to Madame Aroma in Latte for a bottle that comes with a free serving of Chateau Romani.