Definitely get a Flairosol bottle, they are available from many different retailers with different prints on them. They are extremely handy and produce a more even mist of water. The other thing to do is count how many sprays your lather usually takes and cheat next time by starting some ways under. I start all my soap with 3 sprays from the flairosol, which is probably a lot. With a bowl it will coat the whole inside and then some.
I am on this. I ordered a couple of water ones (one for lather, one for stones) and one for oil, also for stones. But it is the very devil to try to figure out which of the types touted on the actual Flairosol site are being sold. And hard to have confidence that you're being sold the original. There seem to be tons of imitators who want to treat it as a generic term, like Kleenex.