Not allowed
At the border
🛂 ENTERINGThailand 
Illegal - leave it at home.
- Thailand bans importing e-cigarettes and vapes; penalties include fines and jail.
Helpful sources
🌐Thai Customs Dept — travellersOfficial guidance↗To be 100% sure, we always recommend confirming with the official channels.
Import rules change often and vary by nationality. Confirm with the Thailand customs authority or your embassy before you travel.