At any sporting goods store even Walmart I think, in the camping supplies they have those 4"diameter maybe 6" tall tanks in a 3 pack for $15 and the little single stove burner attatchment I think is around the same. I turn it on til its like a piolot light and hold it inside the cabinet a few times, few min at a time. Not nearly as effective as a CO2 system but still gets noticeable results.