you can score them from the chemical companies or any company that would bleach in anything that they do. even ttry the hotels , swiming pool dudes-- they go through them
talk nice to them and maybe they will sell them cheaper
you of course have to be careful if you are going to use it for drinking water ... that whatever was inside is ok and will wash out... bleach drums are ok but they need rinsing.. the rest you might want to reconsider as drinking drums
they cost anout 20.00 - 40.00 each new and unused and that is the best if for drinking - but still need rinsing..
sorry can't help more than that.
Un altro mondo e' possible