Vintage idea! A wine vending machine... all you have to do is swipe your driving licence, look into the CCTV camera and blow into the Breathalyser

If the machines prove successful inside two supermarkets, the state Liquor Control Board says it could place the high-tech gadgets in up to 100 more.

Strict licensing laws in Pennsylvania mean individuals can only buy wine and liquor for home consumption at state-owned stores staffed by public employees.

Private beer distributors sell cases and kegs and licensed stores can sell beer to go - but only up to two six-packs per customer.

Several attempts to reform the laws have been blocked by special interest groups intent on maintaining profits from the alcohol trade.

The vending machines are being provided by Simple Brands, based in Conshohocken, Pennsylvania, for free in exchange for being able to sell advertising on attached flat-screen monitors.

Customers choose their bottle of wine on a touch-screen display, swipe their ID, blow into an alcohol sensor and look into a surveillance camera.

The whole process takes around 20 seconds and a convenience fee of $1 could be added after the trial period.