On another post where a web comic showed similar artifacts, I also asked the same question - and concluded that the comic’s resolution was “enhanced”, either by the phone itself (when they saved it from their source) or by a (re)poster. So I think that here it’s the same thing - AI “”“enhancement”“”.
While there are measuring cups, they aren’t a set of cups of fixed volume, like American measuring cups, but rather like beakers with markings on them.
Our baking recipes are also based on the mass of ingredients rather than volume, which frustrates me whenever I see US-based recipes who call out for the “cup” measurement instead of mentioning the amount of grams one needs.