Customers converting from glass to Constar's PET containers with VCT technology secure considerable sustainability benefits. These PET containers are far lighter in weight than glass, resulting in freight and energy savings. With fuel prices continuing to rise, this benefit continues to grow. From a consumer perspective, used PET containers are accepted by curbside recycling programs. Used PET has a high market demand and recovery value, finding its way back into bottles and into products like carpet, clothing and sleeping bags.