Professor Joe Barry:

While I should not make a guess, I expect the cost would be very small as this could be done in an automated manner. Cans already feature a great deal of information. We have a system of food labelling under which a considerable amount of information is already provided. For example, medication is traceable to the chemist's shop where it was sold. A similar approach could be adopted in respect of alcohol. I believe the cost would be tiny in the scale of things.