Yep..another question on how to get protein in!
Isopure plus is a good suggestion, 60 calories, no carbs or sugar, and 15g protein per 8 oz. bottle (you could drink 2 of them and it still will be way less cals. than a regular 8 oz. shake, and you get in the 30g protein), and tastes more like a light fruit drink (really refreshing if you hate the shakes). Alpine punch flavor is pretty good, some detect an after-taste but the few times I had it, it wasn't bad.