Sanyo Electric's subsidiary Sanyo Mavic Media has developed MildDisc which went to market in December 2003. The disc is based on polylactic acid which is produced from corn. It was planned to replace completely plastic compact discs, because it is recyclable and environmentally friendly. The discs developed by Sanyo will degrade after a period of about 50 to 100 years and break down into water and carbon dioxide. When the discs are released, they will be around 3 times more expensive than current CD or DVD recordables, but the ratio will drop to 1.2 according to the manufacturer.