A new generation of legal highs could be hitting shelves this summer, an industry lobbyist says.
The Psychoactive Substances Bill, which will puts the onus of safety on manufacturers, is expected to be passed into law next week.
But that has not stopped those in the industry from testing new products, which look "pretty promising", Star Trust general manager Grant Hall said.
He confirmed some of those tests involved vaporisers, a device used to inhale psychoactive substance "into your system with minimal damage".
The products, at present being investigated by three New Zealand legal high companies, would be similar to e-cigarettes but would deliver synthetic cannabinoids to the user.