I hereby claim the design for the portable hand-washing station, as shown and described.
FIG. 1 is a perspective view of a portable hand-washing station showing my design;
FIG. 2 is a front view thereof;
FIG. 3 is a side view thereof,
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is an explosion view thereof; and,
FIG. 7 is a sectional view thereof.
The broken line shown in the drawing views are included for the purpose of illustrating a portion of the station that forms no part of the claimed design.