William Albert St John Harmsworth (May 19, 1876 – May 4, 1933) was an English businessman who bought and established the fledgling Perrier brand of sparkling mineral water in France, designed its distinctive bulbous green bottle, and made it a huge success in the British Empire.

At the age of 27, when travelling in the south of France, Harmsworth met Dr Louis Perrier, a local doctor, who had bought a spring in 1898 in nearby Vergèze, and was operating a commercial spa and bottling the water for sale.

Perrier was in dire need of investment, and showed Harmsworth the spring, which he then bought into, becoming the sole owner within two years, selling his share in the Daily Mail to raise the funds.

[4] He based the shape of the distinctive bulbous green Perrier bottle, which he designed, on the Indian clubs that he used for exercise following his accident.

[5] The Perrier sparkling mineral water was a great success across the British Empire, and in 1905, Harmsworth received a Royal Warrant.