Sitting behind a computer and staring at the screen for long hours has become a scene office workers are getting used to. The harm on which is causing eye irritation, distraction and even dehydration. An adult needs at least 1.5 l water in average to sustain a day’s need. Below the amount is considered an alarm. Although water drinking for most people’s definition is a spontaneous reflection body asks for, over 50% office workers still cannot fill their body with enough water the standard suggests. iCoaster-APP is invented due to this issue. We hope our users will get more motivation on taking care of their body or just quench thirst.