Successive governments have claimed crack downs on youth vaping but retailers are flouting the law, with just one prosecution on the books.
Retailers have until the end of the year to phase out single-use products, but academics say MPs' fears vape manufacturers will just adapt are justified.
In this week's Focus on Politics, Political Reporter Anneke Smith looks at concerns vape manufacturers will find loopholes in new regulations.
RNZ has obtained more evidence contradicting NZ First minister Casey Costello's insistence she didn't specifically ask for advice on a tobacco excise freeze.