Gin and tonic

Made with one part gin, two parts tonic water, topped up with ice in a highball glass and garnished according to which gin you use, the Gin & Tonic is probably the easiest gin cocktail to make.

The drink was invented in 1870 by British sailors in Asia who found the taste of quinine (the cure for malaria, and an ingredient in tonic water) rather nasty, and so decided to mix gin with it to make it easier to drink.