Water retention unit

Description

FIG. 1 is a perspective view of a water retention unit showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a top view thereof.

Broken lines shown in the drawings illustrate portions of the article that form no part of the claimed design.

Claims

The ornamental design for a water retention unit as shown and described.