It suggested having a cigarette between meals instead of snacks
The TSA guides on traveling with a vape state that: Battery-powered E-cigarettes, vaporizers, vape pens, atomizers, and electronic nicotine delivery systems may only be carried in the aircraft cabin (in carry-on baggage or on your person). That means that all vape devices (cartridges, mods, pens, batteries, coils, chargers, etc.) should travel in your carry-on bags or your pocketsnever in your checked luggage
"It is a category that's going to feel really good for about a year," he said
And Proposition 56 did more than that: It also expanded the definition of tobacco products to include any type of device sold in combination with nicotine e-cigarettes, e-cigars, e-pipes, even e-hookahs according to the state Board of Equalization, which administers and collects state taxes
Another reason includes the fact that they were considered invasive, so with privacy being a major concern these days, they have been replaced although they are still found in some major US, UK, and European airports