We have a pretzel day here at work. How it goes is there’s a rotating pool of people and when it’s “your turn” you go buy a bag (40) soft pretzels. People generally bring in mustard and whatever else. I’m not a huge fan of mustard in general (unlike peppers, it never tasted “clean” to me with the heat, it was always hot and bitter), but today someone brought in some Plochman’s Mustard With Killian’s Irish Red. You open it and the smell is immediately recognizable as “fermenting beer”.
Since we don’t have vegemite in America, I think it’s a pretty obvious use of Killian’s trub.