Maintaining good hydration is crucial for adequate physical and mental performance for all human beings. In this paper we present SPLASH, an Android app that enables users to set daily goals and to keep track of their liquid intake through a combination of smart-phone NFC technology and NFC-tagged cups. We conducted several experiments to verify the robustness of the technology, which indicated that the selected NFC tags had acceptable robustness, operational distance and good penetration ability to meet the intended requirements for monitoring hydration. To further assess the feasibility of our concept, we evaluated SPLASH with ten users who gave feedback on its usability. We discuss the current prototype's advantages and limitations, as well as possible improvements and potential capabilities. At the end of this paper, we propose additional healthcare application scenarios for our concept.