The ornamental design for a conformable and flexiblecontainerliner, as shown and described.
FIG. 1 is a front perspective view of a conformable and flexible container liner showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a left side view thereof.
The broken lines are included for the purpose of illustrating portions of the conformable and flexible container liner that form no part of the claimed design, with the dot-dash line(s) indicating the outer boundary of the claimed design.