You use butane bottles to refill your canisters?

I'm not really impressed with butane performance in the cold to say the least...

I'm not actually sure that refilling is cheaper and i don't think it's recommended either. I found canisters at the BBQ section which are butan/proane mixes which where per gram almost as inexpensive as puncture style canisters or butane canisters.

(BBQ and DIY stores sometimes seems to have inexpensive butane/propane lindell valve canisters)