Small heater to heat up the night in camping but attention can be dangerous if inhaled unventilated

I use that to undress and get dressed in the morning because otherwise I would have fear of risk of disinformation or ignite my sleeping bag too close.

Especially since this uses a cartridge 250 in a very short time (a cartridge full powerful = 20 minutes heating, more if you put on the back burner, but not enough for a deep night) and a cartridge costs between 2 and 5 euros depending on where you buy it.