"You got a Tingle Bottle! Using Miiverse, you can insert a message you've written, and send it out to sea for someone unknown to receive!"
The Tingle Bottle is an item found in the HD remake of The Wind Waker. It replaces the Tingle Tuner, as the Wii U does not support Game Boy Advance connectivity, which is required to use the Tingle Tuner.
The Tingle Bottle is used to send messages to people via Miiverse. Link can write a message, and then throw the bottle out to sea, at which point it is sent to players around the world. This also works the other way, as Link can receive messages from other players. Tingle Bottles from other players ca be found floating in the ocean or on beaches. Pictographs can be attached to the bottles that are sent out and received as well, and any of them that come from other players can be saved to Link's Pictograph Box.