a system and method for preparing a plastic bag especially useful for carrying electronic products by extruding spaced apart ribs onto the interior surfaces so that the bag volume is greater , so that a greater amount of vci or anti - static material can be carried in the bag volume and providing greater surface area for outgassing of the vci into the bag interior . the ribs also facilitate insertion of items into the bag and prevent clinging of the bag interior surface to flat portions of the product carried therein .