Kettle

Kettles are story mode mechanics in the SS undefined. They are used to enter and exit Octarian domes in Octo Valley, Octo Canyon and The Crater as well as missions in  Alterna.

Description
Kettles are devices that appear similar to tea kettles. Most of the kettles are silver- appearing to be made out of possibly aluminum or stainless steel. Some in Alterna appear gold, and Boss Kettles appear to be stoneware or possibly pewter. Boss Kettles in Alterna appear to be cast iron due to the rust. In Octo Valley and Octo Canyon, kettles start off invisible, requiring Inklings to shoot them with ink to reveal them. Once revealed, they can be Super Jumped to at any time. In, kettles no longer start off invisible, but must still be shot with ink to be opened; their functionality is otherwise unchanged. Kettles are covered in a grate, meaning Inklings can only enter them in squid form via. In Splatoon 3, entering a Kettle requires holding for a short amount of time.

"We Octarians dwell in a world deep underground. The individual caves in which we live are connected by a network of transport devices known as kettles. Wow... You learn something new every day!"

- Sunken Scroll 2

Trivia

 * Because the events of Splatoon take place long after the extinction of humanity, relics of human history are scattered around Inkopolis. Kettles are likely based on tea kettles used by humans thousands of years in the past.
 * After a kettle's mission has been completed for the first time, stickers with squid designs in Agent 3's Ink color will appear on it.
 * Most kettles are silver-colored. Some kettles in Alterna are a golden color, indicating the Hero Gear can be used and that the player would not need to spend power eggs to enter them. Also, in every gold-colored kettle, New Agent 3's ink color is the same shade of bright yellow.
 * When stood near, kettles will play the music that is played in the respective mission.