FIG. 1 is an isometric view of a front, top, and left side of an ornamental design for an insulating container;
FIG. 2 is a front elevational view of the insulating container of FIG. 1;
FIG. 3 is a rear elevational view of the insulating container of FIG. 1;
FIG. 4 is a right side elevational view of the insulating container of FIG. 1;
FIG. 5 is a left side elevational view of the insulating container of FIG. 1;
FIG. 6 is a top plan view of the of the insulating container of FIG. 1; and,
FIG. 7 is a bottom plan view of the insulating container of FIG. 1.
The broken lines in the figures illustrate portions of the insulating container that form no part of the claimed design. The dash-dot-dash broken line is included for the purpose of illustrating a boundary line and forms no part of the claimed design.