A liner used to line the grills of barbecues and other types of cooking grill structures. The liner has at least one solid section and at least one perforated section that runs along the length of the liner. The liner is also shaped in a sinusoidal pattern that fits over the parallel rods on a cooking grill. The liner is placed onto a cooking grill above the burners. The solid section of the liner is placed directly above the burners. The perforated sections are not. As such, the liner allows drippings to flow away from the food and fall into the barbecue only in areas where the drippings will not ignite. Thus, the liner eliminates the major cause of fire flare-up when cooking on an open flame grill.