||The contents of this article or section are considered to be non-canon and therefore may not have actually happened or existed.
Duff is a magazine about Duff Beer.
When Bartman accidentally created robot versions of the family they fled, leaving a trail of destruction towards the Kwik-E-Mart. They were reading magazines, much to Apu's annoyance, who was insisting the magazines were for buying only. Barium, reading a Plasmo comic, insisted they were still thinking about purchase. At the same time, Holmium was reading an issue of Duff.