Get 'em while you can.
https://www.kmart.com.au/product/butane ... -42879619/
Now $3, down from $4.50 but they're a Clearance item.
Hopefully Kmart doesn't discontinue it.
if so, it will leave Bunnings for the cheap gas (the price Jetboil et al. charge for their canisters is exorbitant IMHO).