I was told Thermacell units can use Conair butane refills. I can find two kinds one is a can with an adapter that looks like it would work if the cap on the bottom of thermacell was left off. This kind would save lots of money. The others are just like what comes in a thermacell and are only a little cheaper. I have refilled my own in the past but think the cans may be a better way of going. Anyone used the cans or have a family member with a conair butane curling iron they can look at and see if the can fits a thermacell. Everything I am looking at is on line so its hard to judge sizes.