The ornamental design for an ergonomicteakettle with contoured grip and trigger whistle, as shown and described.
FIG. 1 is a perspective view of the present invention showing my new design for an ergonomic tea kettle with contoured grip and trigger whistle;
FIG. 2 is a left side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken line showing of the spout and bottom edge of the tea kettle are included for the purpose of illustration and form no part of the claimed design.