I keep in rotation a stock of at least 9 Kirkland bottled water cases (47.5 gallons). In other words, I use the oldest first. That's 47.5 gallons for a family of 3. I should probably up that to at least 12 cases (63.3 gallons) because most of my family and surrounding neighbors are clueless.
_________________________
If you're reading this, it's too late.