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.Milk cartons are mostly made of cardboard and aluminum. During the recycling process, the different packaging materials are separated for reuse and re-purposing, thus contributing to the infinite path of the circular economy. This material is well known for its high recyclability, as well as for its lightweight and resistance.