The present invention discloses an eco-friendly and economical weavable fiber obtained from discarded cartons of composite packaging material e.g. Tetra Paks and method thereof. The fiber has a very small carbon footprint- it uses drastically less energy and water e.g. cotton uses 55 MJ of energy/kg fiber but present invention uses < 1 MJ. Also, water consumption is 100 times less. The fiber consists of strips of uniform thickness and optimal width 2 cm. The strips are obtained by mechanical opening and cutting of the cartons, washing and drying the sheets and shredding them using optimal set width of 2 cm. The strips are then joined together by suitable means such as heat or glue, pressed to obtain uniform thickness and packed in form of rolls. The fiber can be easily woven into useful articles e.g. waste bins, baskets, mats, partitions, outdoor furniture etc.