How do you remember to drink enough water?

I have tons of cute reusable water bottles, a Brita dispenser in the fridge, I have tried apps and alarms, but nothing seems to work.

It's getting to the point where I'm drinking so little water that it makes my stomach hurt and I get really nauseous. Once I start feeling that way, I will drink some water to make it go away, but I never remember to drink it until I start to feel miserable.

I just don't ever really feel thirsty.