Synthehol

Synthehol is synthetic alcohol, so called because it is produced in microgravity or zero gee environments using an innovative, scientific process rather than traditional brewing as on Earth.
Scientifically, the term refers exclusively to ethanol produced and purified from the photosynthesis of cyanobacteria. Colloquially, it has become a catch-all term for beverages produced by mixing the base product with other ingredients.
Ethanol is produced by exposing cyanobacteria (blue-green algae) to artificially produced light that mimics the wavelength of Sol System's star Helios. Through the photosynthesis process, ethanol in a water solution is collected by closed loop photo-bio-reactors.
The ethanol is then distilled to a near-pure form approaching 95% purity and the water recycled to the cyanobacteria for further production.
This raw ethanol product is used for a variety of purposes including fuel, medicine, for production of anti-septics and mineral spirits, and recreational use.
When used recreationally, synthehol is combined with the carbonated water from a fuel cell and optional artificial flavorings and sweetness are added. Most commercially brewed synthehol is prepared at 15% (30 proof concentration). Spacer bars offer drinks of varying strength where raw synthehol is combined with carbonated water and additives on demand. Many spacers keep a personal "garden" of cyanobacteria for synthehol production for it's various purposes, including recreational use, and many home brews are much stronger than commercially available ones.
Due to the composition of Martian soil and the hardiness of cyanobacteria, Mars is a leading producer and exporter of raw synthehol.
During the Twilight Era, synthehol is blended with nutritional additives to become a staple foodstuff for the spacer survivors of the Solar War. The best cooks of the Rim find the perfect blend between caloric intake, nutritional value, and intoxication. The leading producer of this foodstuff during the early Twilight Era is Bil Jax who terms it Spacer Fuel; it his station's primary export and his most affordable product.