The statutory language specifies containers 'weighing with their contents' over 6.8 kg, meaning the combined weight of the immediate container and its fish contents. Importers should confirm tare and net weights on commercial invoices and packing lists to ensure the threshold is correctly applied at entry.

Surimi undergoes additional processing steps — washing, dewatering, and cryoprotectant addition — that are typically reflected in production records and ingredient specifications. A product specification sheet or processing certificate from the foreign establishment confirming the absence of cryoprotectants and washing steps supports classification as minced pollock rather than surimi. CBP may request such documentation during a CF-28 inquiry.