IMHO, reefer ...
Because not all companies do a lot of grocery warehouses and plenty of dry-vans do visit grocery warehouses. Cereal and Charmin and a zillion other products don't require refrigeration -- at least until Global Warming gets much worse. =0)
In winter, some "dry" products need temperature protection to keep from freezing and a reefer does that. You can always haul a dry load in a reefer but it's tough to haul a reefer load in a dry van.
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