Liquid-type e-cigarettes are expected to become more expensive in South Korea from next year as the government seeks to double the special tax on the type due to fairness issues.

The Korean Ministry of Health and Welfare said Tuesday that the Cabinet has approved the plan to revise the national health promotion law, which would allow the government to impose 1,050 won ($0.90) special health tax on liquid-type e-cigarettes per 1 milliliter(mL), doubled from 525 won per mL.