Abstract: A system for shipping perishable product in a controlled atmosphere environment, by means of various transport containers and/or vehicles. Quantifies of the product are placed in flexible containers or bags having a controlled atmosphere inlet and a gas outlet, to form shipping units. The shipping units are placed in a containing section of the transport vehicle or structure, and the individual shipping units are supplied with the controlled atmosphere gas from a suitable gas source or sources having a gas regulator or regulators. During shipment and storage, controlled atmosphere gas is directed into the shipping units as needed to maintain the proper atmosphere within the shipping units. When arriving at a destination, the quantities of perishable product are either removed from the shipping units, or kept in the shipping units for further storage and/or shipment.