 A "Collins mix" can be bought premixed at stores and enjoyed alone (like a soft drink) or with gin.In August 1891, British physician Sir Morell Mackenzie wrote an article in the influential 19th century magazine "Fortnightly Review" claiming that England was the originating country for the Tom Collins cocktail and a person named John Collins was its creator.In the article, Mackenzie quoted an old song, the title of which he indicated to be "John Collins."