I've blogged old radium-based health product ads before, but this one is a bit of a cake-stealer: the Revigator, sold in the 1920s, was a uranium-infused crock that you filled with drinking water so that it could be made radioactive prior to imbibing.
The glazed ceramic jar had a porous lining that incorporated uranium ore. Water inside the jar would absorb the radon released by decay of the radium in the ore. Depending on the type of water, the resulting radon concentrations would range from a few hundred to a few hundred thousand picocuries per liter.
Considerable confusion persists about the correct pronunciation of "Revigator." The solution can be found in the question-and-answer section of a 1928 sales brochure of the Revigator Water Jar Company. The answer: "re-vig-a-tor. Accent on the vig."
Produced by the Radium Ore Revigator Company (aka the Revigator Water Jar Company) of San Francisco California. Although the address on the jar itself is 260 California Street, their headquarters were at Sutter and Taylor in the Revigator Building which is still there. Their Hayward offices were located at 519 Castro Street, and 641 Castro Street. Some of their regional offices included the following addresses: