The ornamental design for a portablecookerstove, as shown and described.
FIG. 1 is a top perspective view of the portable cooker stove shown with an inserted wind baffle and its lid in an open position to show internal compartments of the cooker stove.
FIG. 2 is a rearside perspective view of the portable cooker stove shown with an inserted wind baffle and its lid in an open position.
FIG. 3 is a rear plan view of the portable cooker stove shown with an inserted wind baffle and its lid in an open position.
FIG. 4 is a top plan view of the portable cooker stove shown with an inserted wind baffle and its lid in an open position.
FIG. 5 is a top plan view of the portable cooker stove shown with its lid in a shut position.
FIG. 6 is a front plan view of the portable cooker stove shown with its lid in a shut position.
FIG. 7 is an end plan view of the portable cooker stove shown with its lid in a shut position.
FIG. 8 is an end plan view of the portable cooker stove shown with its lid in an open position.
FIG. 9 is a top perspective view of the portable cooker stove shown with its lid in a shut position.
FIG. 10 is a front plan view of the removable wind baffle of the portable cooker stove; and,
FIG. 11 is a rear perspective view of the removable wind baffle of the portable cooker stove.
The broken lines depict environment and form no part of the claimed design.