I haven't crunched the numbers of how many bottles per person per day (and those better at mental math will figure this out quickly) but I think the cases are 24 bottles of half liter bottles. The total for the case is just over three gallons, so it is a conservative one gallon per person, per day for three days.

When stocking up, I began slowly and quite randomly. I'd buy a couple of extra cans of something on our list at a time. Then I started getting more systematic about it. Recently our situation has allowed more food purchases at once, so I can speed up the process a bit.

Any good ideas I have are inspired by the wisdom and experience of other ETS forum members <img src="/images/graemlins/wink.gif" alt="" />