Water, water, everywhere...

No, we didn't have water leak, but I have come to realize I don't drink enough of the wet stuff.  I bought a new Nalgene bottle yesterday so I can keep track of how much I drink.  It's a 32 oz. bottle.  I filled it up at 8:30am.  At 3:30pm, it looked like this:

I know it's hard to see against the red wall, but the water line is at 20 oz...