Straw Pipe is an item found in Red Dead Revolver.
|| This straw pipe is the sole surviving testimony that an outlaw named Twiggy Phelps ever lived.
|| —Store description
As with all similar items, the Straw Pipe is not used in the game beyond unlocking a showdown character and journal page.
The Straw Pipe can be purchased from the Shop interface at the start of the mission "Fort Diego". If not purchased, it is not subsequently available during the current game.