Hyrox is the brand name for an early and successful creme-filled chocolate sandwich cookie which debuted in 1908 and was manufactured by Sunshine Biscuits. Its unusual name was formed from those of the atomic elements which make up pure water: hydrogen and oxygen. Some accounts report the Oreo—introduced later, in 1912—was inspired by the Hydrox, yet Hydrox suffered from the misimpression it was a knockoff. Compared to the Oreo, the Hydrox had a "tangy, less-sweet filling."