We’re on a well and have a pump if electricity goes out. Great option though....
Here you go.
30 2.2 Gallon Mylar bags with spigots $35.90 (66 gallons)
50 2.2 Gallon Mylar bags with spigots $52.90 (110 gallons)
http://mylarbagsplus.weebly.com/mylar-bags.html