The thing about protein powders and their serving sizes is… serving size doesn’t really matter. Consider the following:
Brand A: serving size: 40g (3 scoops). Servings per container, 15.
Brand B: serving size: 26.33g (2 scoops) Servings per container, about 23.
Brand C: serving size: 13g (1 level scoop) Servings per container, about 46.
Which is the better deal? Of A, B, and C, they’re all exactly the same amount of protein in the container. (approx. 600g). I just made up all these figures, but the math is real. I used to see stuff like “80g protein per serving” and I was like “whoa!!” and then it says like 10 servings per container. Ok, whatever, that’s dumb.
They just add more scoops to make the protein per serving look bigger. Take Designer Protein for example, who says on their label that one serving is one scoop (17 grams). On the other side, however, it says “three scoops mixed with 8-12 oz of your favorite beverage gives you 51g of the bigest quality protein available.” Well, that’s not one serving, just three scoops.
*As a side note, I don’t know how the hell you could mix 3 scoops of Designer Protein in 12 oz of ANYTHING. One scoop in 16 oz milk is hard enough to mix, much less 3 scoops in less liquid.
Anyway, here’s a cool trick to find out how much protein you’re actually getting:
Take the weight of one serving size (not grams of protein, grams total per serving of everything). A usual label looks like this:
Serving size: 28g
Fat…~
Carbs…~
Other stuff…~
Fiber…~
Whatever…~
Protein…20g.
Using that as an example, you can see that in one 28 gram serving, there are only 20 grams of protein!! That means in each serving you are getting 8g of stuff that is NOT protein. I learned this method from www.proteinfactory.com 
In conclusion, decide how much protein you want per shake. Find out the total amount of protein you get per CONTAINER, not per “serving.” If there are 10 servings of 80g drinks, and you only want 20g per shake, then you’re actually going to get 40 shakes with that bottle, not 10.
Sorry this is long winded, does this all make sense?
IronFist