View this article at: http://www.macnn.com/articles/06/05/15/recycled.rubber.ipod.cases/ Monday, May 15, 2006 2:05pm Recycled rubber cases debut Better Energy Systems today launched Tread, a new line of digital accessory cases made from reengineered Columbian truck tires. Each environmentally aware case is hand crafted and one of a kind, featuring durable waterproof rubber and nylon stitching. The cases boast a sleek design coupled with an integrated headphone holder. The various case styles are available for 40GB third-generation iPod ($30), iPod nano in four colors ($35, Ellipse III blue shown at right), and PowerBook G4 or MacBook Pro ($100). All Tread cases ship with a one-year warranty.