Don't overthink it. Have water available at your desk. When it's empty, refill it. Make it easy to drink automatically. Your body knows when it feels like havi

Don't overthink it. Have water available at your desk. When it's empty, refill it. Make it easy to drink automatically. Your body knows when it feels like having a sip, if that doesn't involve breaking your mental flow, you will have the sip. Simple as that. There's a world of difference between being dehydrated and a bit thirsty. Try going to the beach for a day and forgetting to bring any water. You'll know the difference in a few hours. The fun part is that you'll feel tired all day and all of next day too. I've done this way too often in various combinations (roadtrips, plane flights, marathon runs, surfing and forgetting to bring water, etc.)