This is a miniature enameled teapot, often referred to as an "Enameled Bibelot" (a French term for a small decorative trinket).
this piece was part of a popular line of collectibles produced in the late 1990s and early 2000s. These items were created to revive the 18th-century English tradition of hand-painted enamel on copper, a craft originally made famous by workshops in Battersea and Bilston.