Corrugated fiberboard boxes are classified separately based on their fluted construction. 'Other paperboard containers' under NAICS 322219 typically include folding cartons, set-up boxes, and rigid paperboard packaging that lack the corrugated medium layer. The key distinction is the substrate construction and whether the container is formed from solid or laminated paperboard rather than corrugated board.

Yes. Flat-packed (knocked-down) cartons and fully erected containers may be assessed differently depending on their presentation and end-use. Importers should confirm with a licensed customs broker whether the shipment's form affects the applicable HTS classification and duty treatment, particularly for large-volume orders where reclassification risk is material.