There is some concern that e-cigarettes are being marketed to attract younger non-smokers with "flavored" liquids such as bubblegum, pia colada, vanilla, and others
Morris Coats, A Note on Estimating Cross-Border Effects of State Cigarette Taxes, National Tax Journal 48:4 (December 1995), 573-84, Mark Stehr, Cigarette tax avoidance and evasion , Journal of Health Economics 24:2 (March 2005), 277-97, [4] Shu Wang, David Merriman, and Frank Chaloupka, Relative Tax Rates, Proximity, and Cigarette Tax Noncompliance: Evidence from a National Sample of Littered Cigarette Packs, Public Finance Review 47:2 (March 2019), 276-311
E, enforce bans on tobacco advertising, promotion, and sponsorship
Which states cost smokers the most
Snus is common in Scandinavia and while illegal to sell in the UK they may be purchased via online sites