Back in the day

A Canadian group looks for radioactive artifacts in museums. One such was the Revigator, designed to infuse radioactivity into your drinking water. "According to the manufacturer, the radiation could treat or cure ailments ranging from arthritis and flatulence to senility and poisoning. "The Revigator was an attempt to mimic spa, or spring water," explains Epstein. "People figured that spring water was radioactive, and it seemed to be good for you, so why not make your own?" " The team described in the second link found that the water had plenty of radon, but the radon probably wasn't as big a threat as the dissolved arsenic, lead, vanadium and uranium. At those radiation levels I don't think you'd get significant disinfection of contaminated water, so you don't even get that possible benefit.

But you could take more significant doses. They mention Eben Byers and Radithor, and also

“People would drink radium water at parties and stand behind the screen and look at each other’s organs,” Secord said.

I can see the appeal--if you don't know about the dangers.

UPDATE: We can't forget Gilbert's Atomic Energy Lab. I never got one--possibly because I wasn't born until well after they went off the market.