Access to adequate hydration is essential to public health and well-being, which is a key component in achieving Sustainable Development Goals (SDGs) and promoting global public health. In Chinese universities, students often exhibit suboptimal hydration behavior, and there is an urgent need to promote proactive hydration through proper behavioral guidance. This research explores the solution to promote healthy drinking among college students from the perspective of behavior design. Through literature review and user research, the study gained insights into the pain points of college students in their daily life. Healthy hydration product design strategies were constructed based on the Fogg Behavior Model, and ultimately proposes a smart hydration product system consisting of a smart coaster and an APP. The product system supports students to develop healthy hydration habits, and ultimately contributes to the attainment of the Sustainable Development Goals.