The most important measures are increasing the price of cigarettes through taxation, combined with highly effective social marketing, and widespread smoke-free regulations. Senior lecturer of consumer behaviour and advertising at Deakin University Paul Harrison agreed the downward trend was attributable to a number of anti-smoking measures, including social pressure
(2008) Smoking and risk of cedar pollinosis in Japanese men and women
However, these rules aren't universal across all airports, so if you're travelling with only carry-on luggage, it's best to check the regulations at your departure and arrival airports
Whether you are a retailer, a packaging buyer, or just curious, this is your reference
Nicotine Salts: Even at higher doses, nicotine salts are a chemically modified version of nicotine that is smoother to inhale