Head jars

The technology to keep human heads alive in jars was invented by Ron Popeil, one of the many people now benefitting from his innovation. The jars can even store historical figures who had expired prior to the technology's debut.The liquid within the jar is, as one would expect, safe to drink and people have been shown to enjoy its flavour. This miraculous fluid, known as H2OGfat, is presumably sufficiently oxygenated and rich in nutrients. Heads can and do perform normal roles in society, including Richard Nixon's head President of Earth, but most pass their days in quiet contemplation at the Head Museum.