Royal Museums Greenwich describes nineteenth-century ice imported into Britain from the United States. Ship holds carrying it used materials including sawdust and hay as insulation; this is a documented trade example, not a universal design.
Before publishing an example, check its date, place, material and purpose against an archival record. For a secondary account, locate the document it cites.
Historical accounts of insulation materials such as sawdust do not prove modern package performance. Compare current carriers through product and route trials.