As of 2026, the regulations regarding vapes on planes remain consistent with the standards established in 2023. You must keep your vape device and all lithium-ion batteries in your carry-on luggage or on your person; they are strictly prohibited in checked baggage due to fire risks. While you can carry the device, it is strictly illegal to use it or "stealth vape" while on board the aircraft. Furthermore, you should take precautions to prevent accidental activation and leaks: empty your tank of e-liquid before flying, as the cabin pressure change can cause tanks to crack or leak. E-liquids are subject to the standard "3-1-1" liquid rule, meaning they must be in containers of 100ml (3.4 oz) or less and fit within a single quart-sized clear bag. It is also wise to check the local laws of your destination, as countries like Thailand or Singapore have very strict bans on vapes that could result in confiscation or fines upon arrival.