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It is mainly applied in recording the progress of work in the office and promoting the cooperation of people. The progress bar and water level line inside will vary with the progress with the work, so that the next person who takes over the work can better understand the progress of the work in real-time and improve efficiency. After people finished their work, they can rotate the trigger of the spire with their fingers to call the next person who should take over the work. There are solar panels at the bottom of the small spire, which can save energy and protect the environment. People can change the water to keep the container clean.