I built this for my girlfriend. She gets headaches, the kind that wipe out a whole afternoon, and almost every time I'd ask her the same question: how much water have you had today. The answer was always "not enough." Reminders didn't work. She'd swipe the notification away and forget before she'd even put her phone down. So I built something harder to ignore. Drink or Drown is a hydration app for Mac. When it's time to drink, a water shader rises over a live capture of your screen u...