Every morning I boil water for making tea or coffee (I alternate). What starts my day is the most perfect kettle I have ever used. It is the work of Sori Yanagi (1915-2011), a Japanese product designer probably best remembered for his molded plywood Butterfly Stool. Yanagi studied architecture, but the kettle is decidedly not architectural—no purist Platonic forms, no postmodern irony, no gimmicky whistles. It is just a kettle: handle, spout, lid. Yet this perfectly balanced and shaped everyday object provides a feeling of well-being every time I use it—or even glance at it. In some ways, the deceptively simple kettle, half a million of which are sold annually in Japan, is a distillation of Yanagi’s design philosophy: he was 79 when he designed it.