In a Canadian discrete choice experiment involving 2,961 e-cigarette users and nonusers, researchers examined how health warnings, nicotine strength, plain packaging, and prices influenced preferences for vaping products, heated tobacco, and cigarettes. Warnings on all three product categories increased the predicted probability of choosing none from 50% to 65% among nonusers and from 10% to 18% among users, while lower nicotine strength made vape pods more appealing and price increases produced smaller, mixed effects.