In summary there is provided in one embodiment a grill liner for placement on top of a cooking grate and used to cook food placed thereon. The grill liner includes a plurality of holes to help allow heat to move through the grill liner. The grill liner further includes at least one flap that is secured to a portion of the grill liner through a frangible bridge, point, or line of weakness. The frangible bridge when broken permits the flap to bend downwardly. The grill liner when placed on the cooking grate may then have its one or more flaps bent downwardly through bars such that the grill liner movement across the cooking grate can be limited.