Narc Soda was a brand of carbonated soda.
In 2014, the gun launderer Drebin 893 and his pet monkey Little Grey frequently drank Narc Soda. They even had a vending machine for the drink on board their Stryker. After chugging it down, they often ended up belching afterwards. Drebin drank Narc Soda as a substitute for alcohol while the SOP system was in operation, since his internal nanomachines prevented him from becoming drunk.
Behind the scenes
Narc Soda was named after a drug from the game Policenauts, which was itself derived from the drug "Nuke" from RoboCop 2.