Dark Blue Milk was an alcoholic beverage found at Cid's Parlor in Ord Mantell City, Ord Mantell, in the cantina at the Safa Toma Speedway on Serolonis, in a cantina on Lau, in Tanda's Cantina on Suria space station, and in Losha Tarkon's cantina on Varkana. It came in a dark blue bottle with a grey top, and a lighter blue label with the drink's name written in Aurebesh. The beverage's name referred to another, non-alcoholic beverage called blue milk.
Dark Blue Milk first appeared in "Rampage," the fifth episode of the first season of the animated television series Star Wars: The Bad Batch that aired on May 28, 2021. The beverage later appeared in episodes of Star Wars: The Bad Batch, including season one episodes of "Decommissioned," "Battle Scars," "Common Ground," and "Infested." The beverage then appeared in the first episode of season two, "Spoils of War," that aired on January 4, 2023, and "Faster," which aired on January 18, 2023. Concept art for the alcoholic beverage was revealed in the StarWars.com episode guide for "Rampage." Done by Chris Madden, the concept art showed Dark Blue Milk along with other alcoholic beverages that were shown on the shelves of Cid's Parlor.