Hydrate, Bro. It's in your blood. It's all about energy and for the body, that's water. Without water your brain doesn't work, its pure science: *A human can survive a month without eating food (not suggested), but only a week or so without drinking water. *Your brain is 80% water, there's no where to store water in the brain and these cells need 2x the energy of other cells. If you don't care about your brain, you still need to care about water... Dehydration = stress and depression And, if you're an athlete, you know how important water is for optimal performance. This led us to wonder, Am I Hydrated? We made H2Know sensors so you can have a real-time indicator for when you're reaching dangerous levels of dehydration or over-hydration (yes, that's a thing).