Hynos

Hynos was a South Vietnamese toothpaste company. The brand was most likely founded in colonial French Indochina and operated until it was eventually seized and nationalized by the North Vietnamese in 1975 after the fall of Saigon and the subsequent collapse of South Vietnam, preceding the reunification of Vietnam that same year. Although the company itself has been divested, the brand itself still sees limited usage in hotels and inns. 
History.
Not much is known about Hynos. It is known for being featured in several billboards, the most prominent of which show an African man grinning widely with shiny white teeth (much like the similar Darlie Toothpaste's logo), and a scene involving one of its factories in the 1987 film, "Full Metal Jacket", where fighting between US Marines and the Viet Cong breaks out in the South Vietnamese city of Huế, directed and produced by renowned film director Stanley Kubrick.