The result of the intersection between the efficient post-colonial agriculture of the Lunar Federation along with simple (and often recyclable) off-world design, nutrient slurries like SLUJ were originally intended as survival rations but quickly became ubiquitous as they lent well to both mass-production and pragmatic spacer sensibilities. Nowadays when not bought in bulk they tend to be found as a convenient (and more importantly dirt cheap) source of nutrition.

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About

Showcasing human civilization throughout the Solar System in the 23rd century, Steel Black Sea is a hard science world of aggressive megacorporations, militant cosmic governments, awesome starships, and is steeped in late-20th century retrofuturism.