20 Packaging materials of plastic, namely, containers, clamshell containers, trays, lids, tubs, and preform containers; packaging materials formed from recycled materials; plastic packaging materials in the nature of containers, clamshell containers, trays, lids, tubs, and preform containers, all formed from Amorphous Polyester (APET) resin, pellets, preforms, sheets or thermoforms, and/or recycled APET flake, pellet, pellet preforms, pellet sheets or pellet thermoforms