Okay so I was asked where to get these and since not everyone has a mother in law that can just seem to pull them out of her hat.....
I googled it and came up with this website http://www.bayteccontainers.com/ . I just want to say OUCH!!!!!!
A good and cheep place to look is Craig's list. Search for water barrel and you can find various drums that have been used for juice or soda. I looked a few weeks ago and found some for $10-$30(they were just down in Sumner). They would need a good cleaning but other than that they are perfect for storing water.