Packaging industry is dominant contributor for continuously growing plastic waste amounts. Besides it, reduction in food and beverage plastic packaging waste generation is restricted to some extent due to continuous necessity to ensure safety of the packed foodstuff. To tackle the challenge of the global pollution of the Erath’s terrestrial and aqueous ecosystems, bio-based and biodegradable plastics have been introduced. Unfortunately, the share of biobased and biodegradable plastics continues to be low, ca 1%, from the global plastics production market (1), mainly because of higher costs and more hurdled processing. Consequently, in the light of diminishing quality and quantity of natural resources on the one hand, and increasing consumption patterns on the other hand there is an urgent need to develop novel bio-based and biodegradable composite materials, which could be obtained by low-cost mass production thermoplastics processing methods. This initiated our research on thermoplastically processable polybutadiene succinate copolymer (PBSA) hybrid composites with nanoclay (NC) and fungal chitosan oligosaccharide (COS), which offers more sustainable manufacturing process compared to crustacean chitosan. Addition of COS was expected to endow antibacterial properties, whereas NC was believed to improve barrier properties to the developed hybrid composites, without considerably limiting it thermoplastic processability. Thus, it is expected to contribute for achievement of UN Sustainability Goal on Responsible Consumption as well as EU Green Deal. The current research particularly focuses on the thermoplastic manufacturing of the PBSA/NC/COS hybrid composites and characterization of their mechanical properties.