Alcopops come to mind. Back in the days of 2004 (I'm starting to feel old) a special tax (+1€ per bottle) was introduced to reduce the consumption of a product that is clearly targeted at teenagers. Sugar + carbonic acid accelerate the uptake of alcohol and make the beverage tastier to people who usually don't partake. It was seen as a sort of 'gateway' to alcohol abuse. Results are mixed. Consumption alongside tax revenue has sharply declined. No one knows whether it's really because of the tax. Overall alcohol consumption among youths has not declined.

The general problem of addiction isn't solved by that. But I'd say special tax on sugary drinks that's also alcoholic (= Pigout tax), why not?

_{Schengen is toast!}