Today's water quota, served all at once

I tell clients to drink more water all day; my own glass is still full at closing. This settles the account: photograph yourself at your desk and the day's full water quota arrives beside you - one glass the size of a small bucket, straw sticking out, dead calm, sitting there like it always belonged. You and your barely-touched little cup stay exactly as shot; the comparison is the entire content. Tweak: 'pour what I actually drank' returns a tragically small cup.