Patent ID: 7845514

Claim:
A container lid prepared from an extruded sheet of a high impact polystyrene resin composition, wherein the high impact polystyrene resin composition comprises about 10% to about 15% filler, and wherein the lid comprises: a) a tear back portion defined by: i) a downwardly directed annular skirt defined by an outer diameter of the lid; ii) a tab in connecting relation with the skirt defining a grabbing location for a user, wherein the tab has a left side and a right side; iii) a left and a right notch cut into the skirt in substantial alignment with the respective left and right sides of the tab; and iv) two sets of tear indentations defining a left and right side of the tear back portion, wherein the sets each, independently, comprise from 2 to 4 grooves thermoformed into the lid, wherein a longitudinal axis of each groove of the two sets is oriented in a machine direction of the extruded sheet, and wherein the left and right notches are substantially in alignment with the longitudinal axis of at least one of the grooves in the left and right sides of the tear back portion, respectively, and wherein the tear back portion of the lid is not pre-scored prior to use.