I also used the Brute containers until it was suggested that they are not for potable water and leach out phosphates into the water over time. This may not be an issue as I've not confirmed it, however, I DID choose to switch to a real, potable water container. It's 55 gal and made from a potable water compatible material. It was about $50 with $40 shipping for a total of $90. You can buy it from these guys if you have any reservations about the more affordable Rubbermaid Brute series.
http://www.qualservcontainer.com/catalog/i25.html