Nature line notebook convertible into a smartphone holder and made from recycled milk cartons. Hard cover with bamboo detail on the front cover and matching elastic band, including pen holder. Inside with 80 sheets of single-stripe layout and the distinctive of recycled milk cartons on back cover. Including ball pen made from recycled milk cartons with white fittings, push-button mechanism and blue ink. With the distinctive of recycled milk cartons on the top of the ball pen.