Smoke machines in pubs and primary school discos too Thing to remember though - it's food safe etc - common ingredient in lots of edible stuff That doesn't take into account any changes or effects it can have when breathed into the lungs as a vapour My take on it is - smoking was slowly killing me - 100% I've replaced smoking with something that I consider (at the moment) to have minimal long term effects - would take some pretty big ones to be discovered to make it anything other than a positive switch Sits now in my "care factor" health concerns somewhere with mercury in tuna, caffeine, red wine, saturated fats, heavy metals and the ozone layer. Sure - stopping completely would be perfect, but so would not exceeding the speed limit, crossing the road only at the lights and refusing to fly anyone other than Qantas - it's stopping me from going back to the ciggies and that's good enough for me at this point