Astounding lack of info at the product website. There is, however, a sticker, on what I suppose is the fuel receptacle, that says "Flammable Liquid". The receptacle looks remarkably like a propane torch fuel tank.
I think Bruce was right. It looks like there is no liquid spewing in
the video on YouTube. You wanna set something besides toilet paper or paper towels on fire, you're gonna be a minute.