Vapour released
I would hope that the only vapour released is of rather strong / pungent expresso.
I tried the previous version of these drinks, (Italian), they were not hot enough, and the heating chemicals were in a sealed package.
As to dangerous goods, perhaps yes...I always considered a strong Italian Breakfast coffee as the most dangerous kick my heart ever had.....except from a young ladies husband...but that as they say is another story....