My worst is about 1-2 oz of milk or whatever left in the bottle. This is more at my restaurant job than at home. At home, If you drink a glass of milk then take a sip, and also drink the last ounce.
Another one was at work. Take a half a donut, then later there is a quarter of a donut left. Eat it or toss it, who wants to then pick up 1/4 of a donut?