The spirit includes five varieties of ginseng, grapefruit peel and manuka honey and 38 other botanicals.

Kammerling won’t reveal the exact recipe, only that juniper, Echinacea, ginkgo biloba and goji berries made the cut.

Kammerling said: “It’s made in the same way as gin - the botanicals are macerated in neutral spirit and then distilled in a small pot still to extract all the aromatics."

The drink is made and bottled in Clapham, south London, at an abv of 33% and is priced at £17.99.

In the UK off-trade it is available at Selfridges, Gerry’s, thedrinkshop.com, thewhiskyexchange.com, amathusdrinks.com.

Kammerling’s is also stocked by The Savoy, The Berkeley, Claridges, The Dorchester, The Connaught, 69 Colebrook, Row, Callooh Callay and Rules.