And so, we see that Caleb Bradham, in both inventing and branding Pepsi, invokes a tradition that stretches directly back to 16th century iatrochemical experiments. In advertising his product as an ailment for peptic ulcer, Bradham was drawing upon Priestley’s use of carbonation as a cure for scurvy, which — in turn — was an uptake of van Helmont’s discovery of gas and Paracelsus’s pioneering interest in balneological healing. Pepsi thus emerges directly from the alchemical-archeus tradition. Pepsi is alchemical. It also emerges, therefore, from the same tradition Milton used to fashion the metaphysical structure of Paradise Lost, a tradition he was deeply familiar with. Nevertheless, despite the ancient connection between fizz and eupepsia, it does not aid digestion: it makes it worse. Rather than lending us the hyaline peristalsis of the angels — for whom “what redounds transpires […] with ease” — it aggravates purging and superfluity. And so, as Walter Charleton wrote in his translations of van Helmont, “we (as Nature) advance to the DEPURATION or Defecation”: we advance, that is, to nature’s inherently “excrementitious ways”.
In the early 1990s PepsiCo introduced a colourless form of its now infamous soft drink, which sold under the name Crystal Pepsi. Following from a contemporary marketing fad geared towards selling transparent or colourless editions of familiar products (initiated by Ivory soap), the proviso was that transparency would evoke in consumers positive notions of ‘cleanness’ or ‘clarity’. Crystal Pepsi, however, was a market failure. (The relentless juggernaut of nostalgia has recently resurrected it from limbo, however.) It seems, then, that in our fallen (capitalized) state we actually desire tartareous muck over any vitreous and crystalline elixir.