If I expect myself to refill my bottle each time I'm done with it, constantly, Every single day.
Guess what?
I'm not going to bother, and I'll drink less water as a result.

What a great and simple example and so true! I notice it for myself aswell. I always have a big bottle of water on my desk next to me, but refilling it will mostly just happen when I need to get up for something else. (Mainly to pee, because I drink so much water ;-))