Soylent is named after a food in Harry Harrison's 1966 science fiction novel Make Room! Make Room![11][12] In the novel, most types of soylent are made from soy and lentils. The word also evokes the 1973 film adaptation Soylent Green, in which the eponymous food is made from human remains.[8] Rhinehart also says he chose the name, with its morbid associations, to pique curiosity and deeper investigation, since the name was clearly not chosen with a traditionally "flashy" marketing scheme in mind.[13]
https://en.wikipedia.org/wiki/Soylent_(meal_replacement)

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