This work is part of the Ars Aevi Museum of Contemporary Art collection in Sarajevo. It was created under the theme Neighbors in Dialogue, an international exhibition which was held in Istanbul, Turkey in March 2007. Mentalopia tackles questions of cultural differences, identity, national pride and borders. Sabella asked the ten participating artists to bring postal stamps from their respective countries, and he subsequently merged the artists' portraits on stamps other than their own. That is the people do not represent their own countries, but rather they reside in 'foreign' space.

Sabella coined the term from the words mental + utopia, another indication of his constant inner search for a new reality or world and Sabella's defiance of constructed notions of identity and confined spaces.