Duke and Sons Pvt. Ltd was established in 1899 in Bombay (now Mumbai), India, as a company that manufactured aerated waters and fruit drinks. It was originally owned by the Pundole family, a well-known Parsi business name. Duke and Sons was founded by Dinshwaji Cooverji Pundole. The company used to manufacture Tango, Raspberry, Ginger, Pineapple, Lemonade and Mangola drinks under the Duke's brand. The Pundole family ran the company until 1994, when it was sold to Pepsico. When sold, Duke's had a 55% market share in the segments it operated in Bombay and Maharashtra.

Pepsico manufactured the drinks until 2004, when it discontinued all the drinks apart from Lemonade and Mangola. The decision was based on the fact that the drinks were marketed only in western India, while Pepsico wanted to concentrate on its national brands. In December 2011, Pepsico announced that it was reviving the old flavours under the Duke's brand. Apart from reviving old drinks Raspberry soda, Gingerade and Ice-Cream soda, Pepsico announced the launch of a new drink, Mumbai Masala Soda under the Duke's brand. The relaunch included a bright new PET packaging as well as retro glass bottles in addition to an increased margin for small retailers, enticing them to prominently display the bottles in their shops. Pepsi relaunched Duke's Soda as well, as part of a strategy to increase market share with the help of regional brands.

A duke (male) or duchess (female) can be either a monarch ruling over a duchy or a member of the nobility, historically of highest rank below the monarch. The title comes from French duc, itself from the Latin dux, 'leader', a term used in republican Rome to refer to a military commander without an official rank (particularly one of Germanic or Celtic origin), and later coming to mean the leading military commander of a province.

In the Middle Ages the title signified first among the Germanic monarchies. Dukes were the rulers of the provinces and the superiors of the counts in the cities and later, in the feudal monarchies, the highest-ranking peers of the king.

During the 19th century many of the smaller German and Italian states were ruled by Dukes or Grand Dukes. But presently, with the exception of the Grand Duchy of Luxembourg, there are no ruling dukes. Duke remains the highest titular peerage in France, Italy, Portugal, Spain, and the United Kingdom. The Pope, as a temporal sovereign, has also but rarely granted the title of Duke and Duchess to persons for services to the Holy See.