Nicotine is classed as a Routine 7 ‘hazardous poison’. Therefore it's illegal to get, possess or use nicotine for vaping without a prescription from a physician. Having said that, nicotine in tobacco and nicotine replacement products are exempt and freely available. Vaping designs: There is no a single-dimensions-suits-all vaping type; https://vapingoz.com.au/product-category/accessories/