I do the same thing. Divide it up for later. I mix a one month supply at a time. Sure hope ya'll are right about MFS - I bought my last supply from them, but have not mixed any up yet - next batch will be the test of it for me...
Yep, I bought a liter from MFS but kept reading about how fantastic rts was in comparison so I bought that last time. It wasn't, in my opinion any better....