Hydrox

Hydrox is the brand name for a creme-filled chocolate sandwich cookie that debuted in 1908 and was manufactured by Sunshine (later Sunshine Biscuits). Its name was formed from the atomic elements which make up pure water: hydrogen and oxygen. The similar Oreo—introduced later, in 1912—was inspired by the Hydrox, yet Hydrox suffered from the impression of being a knockoff. Compared to the Oreo, the Hydrox had a "tangy, less-sweet filling" and a crunchier cookie that stood up better in milk.