Yes, butane fumes are flammable and can be harmful if inhaled in large quantities. Always refill your torch in a well-ventilated area to avoid fume buildup, and be sure there are no open flames or ...

Using an inkjet printer cartridge refill syringe ... for blood donation), a water bottle, a can of butane, lots of hot glue, and a few bicycle pump fittings, [Roman] has created a rather ingenious ...