NOC_guy saidWho says that you have to use a protein shake, anyhow? I have been lifting steadily & consistantly for 3+ years & have never once consumed a protein shake or any other supplement for that matter. I have relied on a sensible, higher protein diet. I only eat when my body tells me it is hungry & I stop when my body tells me to. Despite never taking any supplements, I have seen steady muscle gains. While I am sure that this is unpopular thinking with the supplement community, it is my experience.
I have long ago learned to not believe everything that everyone tells me & also that different things work for different people. Hard work, consistancy & common sense work well for me.
I use whey protein, but only because my budget isn't sufficient for the diet I need. It replaces one high protein meal per day that otherwise could not be afforded (in other words, a true 'supplement' - not an addition).
Other than that, my liquid diet consists of coffee and lots of water...and sometimes an espresso martini or two.