STYLETHREAD -- LET'S TALK SHOP!

Ok- I went looking for a few protein shake mixes that have been recommended in the past at Giant and couldn't find them there.  Since I didn't have time at the moment to go to a nutrition store, I bought a can of slim-fast mix knowing it would taste good.  I didn't realize that there was virtually no protein in them til I got home (i just assumed there would be..don't know why).  Do they sell just plain protein powder mix that I can add to my drink?  Is it expensive?  Are there any reccs?  I don't want a protein shake with a flavor.  I have seen them add plain protein powder to smoothies I have bought but don't know what I should be looking for.