The ornamental design for a containerlid, as shown and described.
FIG. 1 is top perspective view of the container lid showing our new design;
FIG. 2 is a top view thereof;
FIG. 3 is a side thereof, all side views of the container lid being substantially identical;
FIG. 4 is a bottom perspective view thereof; and,
FIG. 5 is a bottom view thereof.
The broken lines shown herein depict environmental subject matter only and form no part of the claimed design. For clarity, the matching sets of solid, horizontal lines are used to illustrate the metal material components and differentiate from the polymeric material components, which form a part of the claimed design.