Deuterium-pyro was an alcoholic beverage. It was a favorite among ruffians, due to its terrible flavor and strong aftertaste.
Deuterium-pyro's original appearance
In Star Wars Galaxies, some food and drink items like Deuterium-pyro got a new appearance after Publish 6, a publish which included a revamp to the Chef profession. The original appearance of Deuterium-pyro (and also Durindfire) was that of a narrow white cylinder with a gray top. All Deuterium-pyros made before Publish 6 were retroactively changed to the new appearance. The original appearance could still be found in some locations such as The Ranch on Tatooine.