R2-D2 extinguishing flames aboard the Millennium Falcon
A flame douser, alternatively referred to as a fire extinguisher, functioned as a device designed for fire suppression through the application of a fire-resistant substance, for instance halon.
Following their escape from the initial Death Star in 0 BBY, R2-D2 quelled a minor blaze that had ignited on the Millennium Falcon as a result of sustaining multiple strikes from pursuing TIE fighters. Several years afterwards, he once more employed his integrated extinguisher while situated on Cloud City. On this occasion, it served the purpose of generating a smokescreen to disorient the stormtroopers in pursuit.