Anchorout's suggestion can be done, with both butane and propane. Actually LPG which many large cylinders are, is a mixture of propane and butane. Both can be decanted--and this is common practice on cruising boats in foreign lands where there are incompatible fittings or size of tanks.
BUT, you have to be extremely careful (and you should be with any volatile explosive gas) that the area where you do this is out of doors. If you leak any of the material, it is actually illegal (done all of the time when big tanks are refilled... however...)
The problem would be making an adaptor for this small canisters. They are made for a very few uses, and the consequence of a leaking seal at the exit fitting is a fire, explosion or burn if the seal fails or leaks! I would strongly advise against doing this.
BUT, you have to be extremely careful (and you should be with any volatile explosive gas) that the area where you do this is out of doors. If you leak any of the material, it is actually illegal (done all of the time when big tanks are refilled... however...)
The problem would be making an adaptor for this small canisters. They are made for a very few uses, and the consequence of a leaking seal at the exit fitting is a fire, explosion or burn if the seal fails or leaks! I would strongly advise against doing this.