Ideally it would have some kind of anthropomorphized graphical avatar applicable to the context. Research out of Stanford[1] as far back as the '90s has suggested such interfaces as a means for improving human-computer interaction. If I was writing a letter, for example, perhaps an animated document fastener would be appropriate. In this case, why not an animated, anthropomorphic pizza that morphs into the Domino's logo as a paid-for branding.

[1] https://web.stanford.edu/group/cslipublications/cslipublicat...