There is now a new way to serve Guinness called the Surger, its a good idea for pubs as Guinness is not only one of the most expensive drinks to buy wholesale but unless you have a constant flow of sales the product can also quickly go stale resulting in poor quality. Guinness can be a nightmare honestly. So this little invention is ideal. You can use cans and the device ensures excellent quality every time with no waste.
The Surger device sees bar staff pouring a special can of Guinness, which does not include a widget, into a pint glass. The glass is put on an electronic plate that releases soundwaves into the liquid and creates a creamy head.