Like this one: http://m2.sourcingmap.com/smap/images/item/n/08b/ux_a08041200ux0008_ux_n.jpg
They use butane right? Are they pressurized? What makes them… blow?
All lighters use pressurized butane. The torches mix it with air before burning it, like in a Bunsen flame. This make the flame glow hot and blue. Regular lighters just release pure butane, which can’t burn until it mixes with the air haphazardly. Torches also burn more butane per second.