The ornamental design for an electric steamcooker, as shown and described.
FIG. 1 is a front elevational view of an embodiment of an electric steam cooker.
FIG. 2 is a back elevational view of the electric steam cooker of FIG. 1.
FIG. 3 is a left side elevational view of the electric steam cooker of FIG. 1.
FIG. 4 is a right side elevational view of the electric steam cooker of FIG. 1.
FIG. 5 is a top plan view of the electric steam cooker of FIG. 1.
FIG. 6 is bottom plan view of the electric steam cooker of FIG. 1; and,
FIG. 7 is a perspective view of the electric steam cooker of FIG. 1.
The broken lines appearing in the figures are for the purpose of illustrating the environmental structure of the article of the claimed design and form no part of the claimed design.