Stressful Tuesday, packed schedule. At some point around 3 p.m. it becomes clear: the first glass of water is still untouched on the desk. Not an isolated case — according to the 2019 Germany Drinking Study, 52% of people simply forget to drink on stressful days. Not out of laziness, but because the brain actively suppresses thirst signals in focus mode. This article shows what happens in the body — and what companies can do in practical terms.