Pre-production plastic pellets, commonly known as nurdles, are tiny plastic pellets (smaller than 5 mm or 0.20 in) that are universally used in the plastics industry for the manufacture of plastic products.[1][2] These microplastics are made primarily from polyethylene, polypropylene, polystyrene, polyvinyl chloride, and other plastics or synthetic resins.[3] Nurdles are the building block, via plastic extrusion or injection molding, for items for everyday life including plastic water bottles, containers, and bags.[4]