Gin and tonic is a version of the trick using a dime and a penny .
A number of books exclusively on the subject describe different effects that can be achieved with the Scotch and Soda gimmick .
Gin and tonic is a version of the Scotch and Soda using a dime and a penny .
A number of books exclusively on the subject describe different effects that can be achieved with the Scotch and Soda gimmick .