A message in a bottle can be found on the northwest beach of Waiko, northwest of Rosie (supplies). It can be investigated to receive a treasure map.
This message in a bottle was last visible 1 day ago on 11 February. It will be visible again in 4 days on 16 February. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.

The location of the message in a bottle.

Trivia[]
- The examine text is a reference to the song "Message in a Bottle" by The Police.