The OpenStreetmap Mug.

The mug serves as a reference for the most important and most popular tag/value combinations used on ways and nodes within the OpenStreetMap project. While it cannot explain the fiddly details it serves as a reminder and a quick help while mapping.

The complete print can be found here
A donation of 1,30EUR will be given to the OSM projekt for each sold mug.
The mug can be put in the dishwasher
The design was made by Simon Budig in cooperation with Jochen Topf and Frederik Ramm from the GEOFABRIK