12v cigarette outlet RV Lighter Socket with Dual USB-A Ports WMB00002 requires a two 2.9cm holes approx 12v Cigarette Lighter Adaptor Kit

Research has shown that smoking tobacco can be as addictive as heroin and cocaine

Ho JTK, Tyndale RF, Baker TB, Amos CI, Chiu A, et al

The vaping industry may claim the aim is to help people quit smoking, but nicotine gum or patches have never been advertised as universally as e-cigarettes

Read about civil penalties for prohibited items Even if an item is generally permitted, it may be subject to additional screening or not allowed through the checkpoint if it triggers an alarm during the screening process, appears to have been tampered with, or poses other security concerns

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This choice was made to avoid possible contamination with respect to the knowledge of the study participants basic characteristics and group allocation