On the issue of the boundaries around UPFs, the NOVA classification was developed by a scientist for scientists, but fortunately, there are really good published, peer-reviewed demonstrations that that classification system can be adapted to work for policymakers
Dont bring these at all, not in carry on bags or checked bags
5v 1A micro USB port, recharging from your computer, power bank, USB Charger Upward Electrodes Design: The ignition head of 4 upward-probes is engineered to perfectly provides more convenient uses for cigarettes and candles, or in other flat surfaces What You Get: 1 x Sipoe Arc Lighter, 1 x small Brush, 1 x USB cable
Swiss Tobacco Lobby seems strongly committed to limiting e-cigarettes to 2 ml of e-liquid
Also it is consistent across virtually all major brands sold through US retail channels