They may look like travel shampoo bottles and smell like bubblegum, but after a few hundred puffs, some disposable, electronic cigarettes and vape pods release higher amounts of toxic metals than older e-cigarettes and traditional cigarettes, according to a study from the University of California, Davis. For example, one of the disposable e-cigarettes studied released more lead during a day’s use than nearly 20 packs of traditional cigarettes.
Also, it’s only disposables. I use the rebuildable rtm coils with tiny microcoils I wind myself and cotton at 12W, and I’ve had my blood tested recently per a physcial and lead was on the sheet at a negligible amount.
Some other dude might use an entirely different brand, someone might use pods, someone might use old gear, set in their ways.
And the coils for all of these setups range from pieces of mesh to metal plates to wound pieces of wire to ceramic disks to who knows what. There is no standard.