On his website’s project page, John adds:
Reservoir is made up of five thousand individually heat-formed, clear droplets framed in steam-bent wood. The delicate droplets are attached to a pair of clear filament nets that are supported by tree trunks above. As rainwater or snow accumulates in the droplets, the position and shape of the nets lower and change. As collected water evaporates, the sculpture rises back to its original configuration.
Sheathed springs below pulleys limit vertical range of motion so the sculpture remains at least ten feet above the ground. Even a very light rain creates enough downward movement to be comprehended visually by viewers below. When dry, the sculpture weighs 70 pounds. When filled by a heavy rainfall, the sculpture can exceed 800 pounds.
For more information along with some additional process and installation photos, visit John Grade Studio.[via Colossal]