I have been refilling water containers monthly. Once you are pretty much full up, its important to stay on some sort of regiment to keep up with expiration dates and such. I am actually doing more with excel spread sheets and such to keep up on that stuff.
We rotate everything...food, water, perishable medications and supply's. We let the water get well below acceptable level this winter. Hard to get ahead of the curve. When it is hot and we are all active it is easy to smash a 24 flat of water in a little over a day.
...I actually fill 5 gal water jugs made for camping. I have to turn them over more, every 6 months, but I find it easier. I don't drink alot of bottled water at home...
What kind of jug/dispenser do you have? I've been entertaining the idea of keeping a couple 5 gallon jugs in my shop for continual drinking to avoid runs to the house and add water storage in a separate location.
So I was wrong, they are 7 gallons. They have a pour spout and everything:
Reliance Jumbo-Tainer Water Container - 7 gal. at REI.com