Tom collins combines gin, lemon juice, and soda water to make a cooling and slightly effervescent drink. This is a venerable cocktail, but the ancestor of several generations of the Collins family of drinks was the popular John Collins cocktail. In the middle of the 19th century, a bar person named  Collins is credited with creating the Tom Collins.  The original recipe used the sweeter ‘Old Tom’ gin style. Tom Collins is a classic cocktail dating back several generations, and it is known across the globe.