I think the Reliance containers I have are different from the ones you had problems with. Mine are blue, and shaped more like a "block" or cube; not a "Jerry Can style" shape.
I think I originally ordered them somewhere else; but here's a picture of the them at Aqua Pak at Amazon.com

I too had read somewhere about not placing them directly on a concrete floor; so, it put down a piece of plywood, covered that with a piece of plastic, and then placed the Aqua Pak on that.
So far, no issues with leaks or container failure.