
Tonic water is a carbonated soft drink flavoured with quinine, giving it a distinctive bitter taste.
Clean carbonation over a moderate sweetness, cut through by the dry, lingering bitterness of quinine.
Lengthening and defining a drink at full volume, it is built over ice and stirred briefly to preserve fizz, poured to top a spirit and supply both carbonation and its signature bitterness.
No plain fizzy mixer substitutes cleanly, since the quinine bitterness is the point; the closest approximation is soda water dosed with a quinine-bearing tonic syrup, with sweetness rebalanced by sugar or syrup as needed.
Soda water is plain carbonated water, sometimes mineralised, with no quinine and no sweetness; tonic water contains quinine and is sweetened.
Bitter lemon is a quinine soft drink additionally flavoured with lemon juice and peel; tonic water carries the quinine bitterness without the lemon flavour.
Tonic water dissolves quinine, a compound originally derived from the bark of cinchona trees, into sweetened carbonated water. Modern versions carry far less quinine than the original medicinal form and are usually more sweetened.
Loses carbonation quickly once opened and goes flat; keep sealed and chilled, and use promptly for the best fizz.
Tonic water originated in 19th-century India and other tropical posts of the British Empire, where medicinal quinine was mixed with soda and sugar to mask its bitterness; the first commercial quinine tonic water was patented in 1858.

Gin and Tonic
London dry gin

Vodka and Tonic (VAT)
Vodka

Dunya
Quince rakija

Garden Royale
Dry sparkling wine

Italian G&T
London dry gin

Limoncello and Tonic
Limoncello liqueur

Non-alcoholic Gin-Tonic
Non alcoholic

Yellow Twilight
Chamomile cordial

TNT (Tequila and Tonic)
Tequila reposado

Calvados and Tonic
Calvados

Coffee and Tonic
Italicus liqueur

Mona Lisa
Herbal liqueur (e.g., Green Chartreuse)

Espresso Tonic Surfer
Non alcoholic