Tap a cup size each time you drink plain water — the vase fills as you go. You can step back to an earlier day and log into it.
Goal 2,000 ml · default
change
Logging into 23 Aug 23 Aug — a cup tapped here lands on that day, not today.
This page counts plain water only — not tea, coffee, soft drinks or water in food. Pale urine and no thirst usually means you have had enough; the number is not worth forcing.