"This is a bag made of PET bottles." In a shared office on Yanghwa Road, Mapo-gu, Seoul, on the morning of June 3, Wang Jong-mi, 40 years old, shows the reporter a yellow-green knit bag with wrinkles. Named "Pleats Mama," it is a start-up venture company that produces eco-friendly products that reduce carbon dioxide emissions and waste landfills. Her bag has a label called 'Made from plastic bottles' and a trademark called 'Pleats Mama'. It is made from recycled polyester yar