What we do know certainly is that taxes and price impacts behaviour for all types of different behaviours. For example, taxation is actually one of the strongest most powerful tools that we have at our disposal to address tobacco smoking. Early results to date indicate that it's also useful with vaping.
The reality is that it doesn't matter what product it is. If you put a high enough tax on any product, you will curtail behaviour. It's just a basic part of economic theory. Price has an impact on behaviour, and if we put sufficient taxes on vaping products you will definitely, 100% see reductions in vaping consumption.