An apparatus and method are disclosed for cooling perishable goods including fruits and vegetables, such as for example grapes. The apparatus includes an air bypass prevention dam having a tarp for covering exposed surfaces of the containers of the perishable goods. The tarp may include wedges to prevent the containers from collapsing into a central space as air is forced through the containers. The air bypass prevention dam further includes a rigid restraint structure affixed to the tarp for preventing the tarp from being pushed away from the containers as air is forced through the containers.