Every week, we're told, one skateboard factory produces enough waste material to fill a city bus. With Skateback, a stylish iPhone case made from skateboard wood waste, Portland-based design companies Grove and MapleXO are doing their part to put a dent in it. And the collaborative effort is no run-of-the-mill design. Available in three colorways--vibrant, calm, and neutral--the striped protective back is full of personality. Apply it to your iPhone 4 or 4S via a peel-and-stick 3M adhesive that promises residue-free removal when you're ready for an upgrade.