Vector and Colibri are very good quality, clean brands of butane. Probably won't find them at the supermarket though, but all your
tobacco shops and headshops should carry one or both.
There is a difference between the cheapy stuff and the good stuff. Spray some on a mirror and compare what's left over, there should be nothing with the Vector or Colibri, where as the janky stuff will leave crud behind, which will clog up the tiny jet nozzle in torch lighters.