Kettles are old brass kettles that contain very few items.
There are two types of kettles, the brass kettle that is interactable, and a porcelain tea pot that is only interactable in one specific location.
Kettles can be found in both wastrel Houses, and wellie houses. They tend to be found in the kitchen area. Sometimes the porcelain kettles can be found in parks or in offices, though only one or two are actually interactable.