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In 2026 both Royal Mail and DPD will transport nicotine e‑liquids in the UK, but they differ on speed, insurance and acceptance checks. This guide compares permitted services, packaging and battery rules, age‑verification, insurance limits and seizure risk under the new Vaping Products Duty so you can pick the right option for your shipments.

WS-23 is a flavourless synthetic coolant that gives strong "ice" sensations while natural menthol adds a mint character. This 2026 comparison explains differences in flavour, prevalence and safety evidence — including MOE findings — and gives practical advice for vapers and regulators.