The device is fundamentally a solar desalination machine that takes in salt water and heats it with natural sunlight. What makes the machine efficient is its ability to circulate water in swirling eddies similar to larger “thermohaline” circulation that happens in the ocean. This movement, coupled with the heat of the sun, results in water evaporating and leaving the salt behind. The water vapor can then be collected and condensed to be used as pure drinking water.