A revolutionary new gadget that could potentially save lives has gone on sale for 55 in the UK.

The iBreath is an MP3 player with a twist. It has a tube that once blown into will measure the alcohol level of your bloodstream up to 0.12%. As such owners of the fancy gizmo who can't remember if it was one pint or two can always find out.

However experts have warned that the device could have its dangers. Sun GP Dr Carol Cooper said: "This will tell you how much alcohol is on your breath, not how much you are impaired by it."