Bantha bile was a material harvested from the bantha on the planet Rodia. It was a black-market substance that was used as a medicinal remedy.
Han Solo smuggled bantha bile during the Galactic Civil War in containers marked with a Rodian head icon.
Behind the scenes
The concept of bantha bile was created by artist Timothy Bradstreet for his illustration of Han Solo on the cover of Star Wars Insider 89. Originally he wanted to depict Han with contraband death sticks but Lucasfilm did not want the Corellian associated with these drugs. Instead Bradstreet chose black-market bantha bile to be depicted in shipments stamped with Greedo head icons demonstrating the materials planet of origin.[source?]
Source
- Star Wars Insider 89
- Over My Dead Body -- Solo's Cover Story on Hyperspace (content removed from StarWars.com and unavailable)