Yep, Dave is correct.
One bottle, for one motorcycle will last a very long time.

I use Red-Line additive, (now). In many other ICE's, (Older things). Where I used to use, brands, which were to, 'slippery' for a wet clutch.  And that just happened to coincide with, running out, of 'other' stuff. So now it's just the Red-Line.

Storage. I put not opened bottles, in zip top baggies.
And, opened bottles, baggies also, but store them laying down.
Have not experienced any separation 'yet'. (in Red-Line).
(Having only had it around for a couple of months).
However in the past, if a product separates, the separation layer, by laying the bottle on it's side', is much thinner. And the hot water, 'bath', and shaking. puts them together again.  

I have just put water in the coffee maker. When done, put the bottle in a pail, pour the hot water over it. Wait 1/2-1 hour, shake. It works for me.

And again.  Who knew, that a '06 ICE, Still needed Zinc.
So much thanks for the information from this site.