During a festival, guests spend a long time in the sun and in the warm tents. This combined with a high intake of alcohol causes a risk of dehydration. Roskilde festival is already doing very much to avoid dehydration by having water booths set up everywhere at the festival. But when drinking abundant amounts of alcohol, you easily forget that drinking water is also necessary.
Therefore, a team of DTU students has put a urinal at the Volunteers Lounge, where volunteers can test if they lack water. The urine collects urine and the color is measured electronically. Depending on the range of color within, a signal is sent to a display showing the degree of hydration and how much water should be consumed.
You can read more about the projects in the following links:
https://www.tv2lorry.dk/artikel/festivalgaest-med-smart-ide-tis-maaler-forhindrer-dehydrering
http://www.dtu.dk/nyheder/2017/06/50-shades-of-yellow?id=4db51d2f-279e-4856-a8ec-6bd401e7c4ad