Forrest Mars, Sr., son of Frank and his first wife, Veronica, was inspired by a popular type of milkshake in 1923, to introduce the Milky Way bar, advertised as a "chocolate malted milk in a candy bar", which became the best-selling candy bar. In 1929, Frank moved the company to Bakersfield, California and started full production in a plant which still exists today. In 1930, Frank Mars created the Snickers bar and first sold it in US markets. In 1932, Mars introduced the 3 Musketeers bar. The same year, Forrest started Mars Limited in the United Kingdom and launched the Mars bar.