The ornamental design for a combinationcoldbrewmaker and insulating drinking container, as shown and described.
FIG. 1 is a perspective view of a portable coffee extractor showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in the drawing depict portions of the combination cold brew coffee maker and insulating drinking container that form no part of the claimed design.