The Duchess is a pre-mixed non-alcoholic G&T from South Africa, where it was launched last year.
It is being imported into the UK by Love Drinks, which also distributes El Dorado Rum, Hayman's Gin and Mr Black Cold Press Coffee Liqueur.
It is made with botanical extracts and a bespoke tonic water to create an "elegant, sugar-free alternative to alcohol," said The Duchess co-founder, Johannes Le Roux.
"Obviously the taste was the number one priority – the drink had to taste exactly like an alcoholic version of a gin and tonic – and we tried many variants before going with the liquid we have now," he said.
"One of our secret ingredients is the botanicals that we add to the tonic water – the botanicals were formulated by my aunt, a local botanist, who often experiments with herbs and botanicals found in South Africa. Once she added a few drops of the botanicals – we knew that the flavour was perfect!"
With one in five UK adults now teetotal, alcohol-free alternatives and soft drinks are an increasingly important part of your drinks offer.