Abstract: The cargo carrier of the present invention is a cargo container that comprises at least one immobilizing flap that allows it to be secured inside a vehicle without shifting position as the vehicle moves. The immobilizing flap is securely affixed to one side of the container, and is protrudes through the base of the tailgate, trunk or door of the vehicle, stabilizing the cargo carrier in the cargo area of the vehicle. Another embodiment of the immobilizing flap is a loop of fabric through which the vehicle's seat belt can be extended, stabilizing the cargo carrier in a vehicle's seat. The cargo carrier take any number of forms found in the prior art to include collapsible coolers, golf bags, reusable grocery totes, food catering bags, and other carrying devices.