Actually, they are not using e-liquid or something like that, by the info in their websites, looks like it is in fact tobacco mixed with PG and VG, they are not extracting nicotine from tobacco, also the device can use any kind of herbs, so no drug/device combo and the intended purpose could be just vaporize any kind of plant material, while the FDA said the e-cigs are only for one main purpose: Use liquid nicotine in them, so that makes e-cigs according to the FDA a drug/device combo.
Look at the possibilities of this device, maybe it is BT, maybe not, but at the end, you can get a small, reliable personal vaporizer that maybe with some modifications you can use with e-liquids and in an emergency you can use it with tobacco for $35, no batteries and no atomizers.
I know a lot of people want to stay away from tobacco, but tobacco is not the problem, the problem is the smoke, vaporizing tobacco is a very good way to reduce harm.