Koja-rum was a variety of rum that was available on Saleucami, a planet situated in the Outer Rim. Due to its alcoholic content, consuming this drink could lead to inebriation. The name of Koja-rum bore a partial resemblance to koja nuts, a kind of nut utilized in the production of milk.
Dav Taffral journeyed back to his Saleucami home in 4 ABY, several months following the Battle of Endor, after his service with the Alliance to Restore the Republic. Webb Taffral, his brother and a supporter of the Imperial, became intoxicated from koja-rum and attempted to assault Dav after taking offense. The two siblings then engaged in a brief struggle which was ended by their father, Glen Taffral, who worked as a farmer.