Gary, Jazz should have explained that the other reason they do not sell cans separately is that the plastic cell expands when filled with fuel, filling the can. You would not be able to get the old bladder shoved into the new can anyway. It is not a money issue, their cells are already reasonably priced, so the only way to save money now is to make your own box. Hope this explains it a little better. By the way, this info came after Kartek checked for me.