In Eumaeus Bloom proposes that Stephen drink "a cup of Epps's cocoa" with him at Bloom's house, and in Ithaca the two men do just that. Epps's was a brand of water-soluble cocoa commonly available in Dublin in 1904.
Gifford quotes from an ad in the 18 June 1904 Weekly Freeman: "Epps's Cocoa; Grateful and Comforting; Nutritious and Economical; . . . The best suited for all ages and classes, The greatest invigorator for the fagged. Justly prized by Mothers for themselves and their children, who choose it eagerly."