In reply to Roberttaylor:
I thing there is more standardisation that Robert thinks, I have a generic fuel bottle that I'm quite certain is identical to my old sig bottle that is no more and I use it with a MSR whisperlite stove.
from this website:-
http://adventuresinstoving.blogspot.co.uk/2012/04/how-much-white-gas-do-i-n...
"A note on fuel bottles: MSR, Sigg, Primus, Optimus, Snow Peak, and Brunton fuel bottles all have the same threads and are generally interchangeable. However, you should always test your particular stove with the particular fuel bottle you intend to use before your trip. My Primus pump fits in my MSR fuel bottle, but the opposite is not true: My MSR pump does not fit in my Primus bottle. The threads on the Primus bottle are compatible, but the threads start down too low in the neck of the bottle for my MSR pump to engage."