WaterJewel: be aware of your daily servings of water with an LED-illuminated bracelet

A recent study revealed that every fourth German adult drinks less than 1.5 litres a day. In the long term, this leads to dehydration and can cause confusedness, faint, or can even be mortal. To overcome their problem, people affected use reminder signals which they often miss or yet deactivate because they are too obtrusive. In this paper we present WaterJewel, an LED-illuminated bracelet which reminds the user to drink, as well as it rises the user's awareness for their drinking frequency in an unobtrusive way. Eight single light spots on the bracelet indicate the amount of drinks taken. Another light spot presents the time elapsed since the last drink. We found that with WaterJewel, people manage to drink 2 litres a day and drink more regularly than with current approaches.