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To remind the people who are busy and might forget to drink water of drinking some water, this design adds a reminder device, which is powered by the solar energy, on the top of the bottle cover. After the water cover is closed, the timer will start counting the time. The longer you haven’t opened the cover and drink the water, the light gets brighter. In occasions where any light may be unsuitable, you can press the button on the bottle cover once and the reminder will be turned off.
Taichung City, Taiwan