When we interviewed sketchmeister Spencer Nugent last year, he mentioned that sketch newbies frequently ask him what pen they should use. Spencer dismisses the notion of there being a "magic pen," and we all know Leonardo da Vinci could draw masterpieces with a rock and a slate; here's more modern-day proof that you really can draw with anything.

Shanghai-based artist Hong Yi, a/k/a "Red Hong," enjoys drawing with anything but traditional drawing utensils, having used sunflower seeds, ketchup, milk, and salt, among other things. Her latest work is a portrait of Taiwanese pop star Jay Chou drawn using coffee cup rings.

"Quite a tricky medium to use," she writes. "Too much water and the rings wouldn't form easily, very little water and you'd have to be precise with where you place the cup coz the rings would pretty much be permanent." We wonder if it was trickier than an earlier portrait she did of another Asian icon: Yao Ming. She "drew" that one with a paint-dipped basketball.