Nature line notebook convertible into a smartphone holder and made from recycled milk cartons. Hard cover with bamboo detail on the front cover. Matching fabric bookmark and elastic band including pen holder (pen not included). Inside with 100 sheets of single-stripe layout and the distinctive of recycled milk cartons on back cover.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.