33 Beer was the name of a Vietnamese-produced beer (pronounced "Ba Muoi Ba" in Vietnamese, which means "thirty-three). It became well-known among American GIs during the war in Vietnam in the 1960s and 1970s. In 1975, when South Vietnam fell to the North Vietnamese, the communist government changed the name of the beer to "333 Premium Export Beer" in order to distance itself from its colonial origins. It was prepared as a rice beer using rice. It is now made by Sabeco Brewery.
History
33 Beer's name was devised per the manner in which it was packaged in 33-centilitre (11.2 ounce) bottles when it was first produced in the early 1900s.
References
33 Beer Wikipedia(Text) CC BY-SA