In this concept design for the Core77 contest, Jim Mielke of the United States really pushed the boundries of his imagination. When the cell phone rings, you push a small dot on your arm. A 2-by-4-inch tattoo with the image of the cell phone's digital display then appears. Answer the call by pushing one of the tattoo's buttons. When you're done, the tattoo disappears. And best of all, you'd never leave this phone in your jeans in the washer.