Well, I always wondered about those people, you know, the ones desperately grabbing everything in sight at the supermarket when there is a huge storm forecast, and they tell the reporter that they have nothing in the kitchen.
They really mean it.
They have a 0 meal reserve.
In other words they have 0 meals before doing whatever someone who promises them a meal to do.
They have 0 meals before they panic, panicked people become desperate.
Britain's MI5 has a maxim "society is four meals away from anarchy." Most governments and organizations recommend to have 3 days of food on hand. On the other hand other groups recommend 3 months to 1 year.
Most organizations estimate that the average family has food on hand for 3 days, though if you go to the median (ignore the extremes like the ones with no food and the ones with a year's supply) I would guess you could get a week out if what is in the cupboards.
How many meals do you have in reserve?