Many consumer goods can be exported from the US, with the exception being products from the technology sector. The Department of Commerce’s Bureau of Industry and Security administers the Export Administration Regulations that govern the export of commercial and dual-use goods, software and technology, including hardware and software containing certain encryption algorithms.
There are also established weight limitations for intermodal containers based on length(20ft-20,000lbs/40ft-40,000).
Hazardous non-allowable materials include any substance or material that is flammable, corrosive or explosive. This list of items contains many commercial and consumer products, which includes, but is not limited to: aerosols, batteries, cleaning solvents, fertilizers, paints, pesticides, and poisons.
Perishables are also not allowed to be stored in moving containers as these containers can be placed in storage for a while, in which time the perishable items will die or spoil while in transit.