Raktajino is Klingon coffee, served steamed or iced.
Raktajino was known to relieve Romulans from the effects of yellow kryptonite, when Taev Radaik drank raktajino after having handled yellow kryptonite. (RIS Bouteina: "Sphere of Influence")
Relm drank raktajino before getting into an holodeck to beta-test an holographic program. (RIS Bouteina: "Grade Inflation, Part One")