Monitoring hydration of people is a tedious work, which is done most of the time also inaccurately. The current invention comprises a drinking cup comprising: an opening for outflow of a fluid held in the cup; and a drinking sensor for detecting drinking of the outflow of the fluid. The cup according to the current invention provides the advantage of an improved accuracy of monitoring the hydration of a person drinking from the cup making the work of caretakers easier and allowing for improved treatment.
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