The Textured Teakettle is a 'harvestable' that was introduced during the Ratboy's Nightmare Update. It is one of the many collectibles that are needed by the players in order to complete the entries of the Itempedia of the Nightmare.
It can be found anywhere in The Supermarket, usually seen on shelves, furniture, and props that are scattered across the zone. It is also possible to see it in The Back Area, found on the storage shelves closest to The Supermarket's exit/entrance.
As implied by its description, it is made out of shiny materials and various metals that are used to craft the impressive teakettle. Unlike 'standard' teakettles, the Textured Teakettle appears to be longer in length and height, instead of looking similar to the size of a real-life teakettle.
The Textured Teakettle does not have any usages in-game that will benefit the players, other than to be sold to a selling vendor at a selling price of 6,999 gold.