With the recent introduction of  Levi’s® Waste<Less™ for Spring 2013, a new line of denim partially made from post consumer waste, specifically recycled plastic bottles and food trays, Levi's really seem to be taking this sustainabilty thing seriously. 

PET plastics – including brown beer bottles, green soda bottles, clear water bottles and black food trays – are collected, sorted, crushed into flakes, and made into a polyester fiber. This is then blended with cotton fiber and woven with traditional cotton yarn to produce a high quality denim, a process adding what Levi's describe as a beautiful undertone and unique finish to the final product. Interesting, green-tinged denim seems quite appropriate.