Phattro was an alcoholic drink sold in bottles in cantinas and diners, like Tiggs Leo's tavern, Trueping's and Plop Dribble's. The name was printed in Aurebesh on the label. It was advertised on posters in the Coruscant Underworld.
During the Clone Wars, Phattro was part of an advertisement campaign that included travel advertisements for Ryloth and Kashyyyk. Posters featuring the three were put up on walls in a repeating pattern near a Hover Taxi station. Advertisements for Phattro were also found in other parts of the Underworld.