Some people think tapping the sides or top of the can will break up the bubbles but, according to an article on Chow.com, representatives from both Coke and Pepsi agree that the tapping method does not work. In fact, by adding energy to the system, you stand a chance of generating more bubbles.

Does tapping a can really work?

Tapping a beer can is a time-honoured way to stop it fizzing over when you open it, but does it work? Sadly not, according to researchers who carried out a randomised trial to find out. There is a theoretical rationale for tapping your brew. Bubbles of carbon dioxide form on the inner surface of a shaken can.

What does tapping on a soda can do?

Tapping dislodges the tiny bubbles from the walls of the can, and causes them to rise to the top. Then, when the can is opened, all the fizz will be formed near the top and less fluid will be displaced.