It can be found lying on beaches or floating in the ocean and appears as a regular bottle with a piece of paper inside. Once the message has been read it will become an Empty Bottle.
Upon reading the message, the player's map will open and a red X will be placed randomly on it, possibly in an area the player has already explored. If the player travels to the location, they will find two bones laid out in the formation of an X in a pile of dirt which can be dug up with a Shovel to uncover a Chest and two Bone Shards. Snakes will also appear occasionally when the chest is dug up. The chest usually contains valuables such as Dubloons and Gems.
Each Message in a Bottle corresponds to a single treasure location determined during world generation, making them a finite resource.
- If the player tries to spawn the Message in a Bottle using the console and reads it, the character will say "This message is faded, I can't read it".
- If the player carries a Message in a Bottle and uses the Teleportato to teleport to a new world, once reading the bottle they'll say "This doesn't look like a map of this place".