
Lemon-lime soda is a carbonated soft drink flavoured with lemon and lime, typically clear and sweetened.
Sweet and lightly tart, carrying a lemon-lime citrus character over crisp carbonation.
Topped over a built drink as a lengthener, it adds sweetness, citrus flavour and effervescence in one pour, added last to preserve fizz and dosed to fill the glass.
Any other clear sweet lemon-lime soda works interchangeably; failing that, soda water rebuilt with sugar syrup and fresh lemon and lime juice restores the carbonation, sweetness and citrus, though not the exact commercial flavour.
Clear/cloudy lemonade (UK/Australia/NZ)
In the UK, Australia and New Zealand the clear carbonated lemon-lime soft drink is commonly called 'lemonade', while in North America 'lemonade' usually means a still, uncarbonated lemon drink; the sparkling soda is the same product under a different name.
Lemon-lime soda is sweetened and citrus-flavoured; soda water and club soda are unflavoured, unsweetened carbonated water, and tonic water is flavoured with quinine.
Bottlers combine carbonated water with a sweetened, acidulated citrus flavouring, often using citric acid for tartness. Most versions are colourless, though coloured varieties also exist.
Once opened it loses carbonation and goes flat; reseal and refrigerate to keep the fizz, since flat soda adds no effervescence.
The first mass-market lemon-lime soda launched in 1929 as a lithiated lemon-lime drink, now known as 7 Up.