Of all the Dyson hair dryers, it's safe to say this is the top of the already-impressive line. The Dyson Supersonic Hair Dryer 23.75 Karat Gold ($449) has actual gold leaf sourced from Florence, Italy, on top of a gesso red colour. Over time, some of the red is revealed under the gold giving the hair dryer a look similar to a gilt decorative object. So, think of it as if you're giving them a piece of art . . . that's totally useful, too.