Don't even think about it.
Buy one now! It's really quite amazing and the fuel seems to last forever. Only complaints are the lid and bottom cup will not stay on. Also, the cup is very hot to drink out of. Burns my lips. I am looking into whether or not the hot lips silicone lip protectors from Snow Peak will work on the Jetboil cup. Other than that, it is light, compact and really ingenious. Boils water SO fast! I love it!