You can create Teacups that show the value (often storage) against some full value for that object (full reservoir). You can show multiple teacups in a group to display the relative fullness of many different items. Teacups can be rectangles or trapezoids. See Figure 6.1.

You can also create Flow Lines, which often represent the flow of water in a river network. You can configure the flow lines to change thickness based on the flow compared to other values in a group, and change color and line type as the flow crosses thresholds defined on each particular flow line. See Figure 6.2.