The ornamental design for a watercontainer, as shown and described.
FIG. 1 is a top, front perspective view of a water container, embodying my new design;
FIG. 2 is a front view of the container embodiment depicted in FIG. 1.
FIG. 3 is a back view.
FIG. 4 is a top view.
FIG. 5 is a bottom view.
FIG. 6 is a left side view; and,
FIG. 7 is a right side view.
The broken line showing of a hose and shower head in the FIG. 1 view is included for the purpose of illustrating environment of the water container and forms no part of the claimed design.