Suck on that morning savers!
“Numerous studies have shown that traditional butane fuel is extremely toxic to humans”… I’d like a link to these “studies” to these “EXTREME TOXIC” finding". What a crock of BS.
What is so special about these that makes them worth $100 each? I had to go to Kickstarter just to find one that’s narrow enough to light a candle that’s inside a holder!
Pure oxygen is also toxic to the body so maybe there trying to help us by burning the oxygen up too 
They are not. The mothership has these for maybe $30 quite often. (currently 1 for $20, 2 for $29.)
That said, I bought 6 of these last fall for Christmas gifts and everyone loved them.