Could someone explain just what these lighters are doing differently from a normal (less windproof) lighter? They use ordinary butane, so the gas pressure has to be exactly the same. Do they just burn fuel faster and use a taller windscreen around the nozzle, or is there more to it than that? They look like really nice lighters but I don't see why Bic can't be making lighters with comparable performance (if less coolness) in the two or three dollar range.