I'll second the choice for Wal Mart's Six Star Body Fuel, Advanced Whey Protein, comes in 2 Lb container, though. Chocolate tastes great cold, just mix with water or, I mix some powdered milk too. 1 Scoop (27 g) gives you 110 calories yet only 3 g carbohydrate & just 2 g sugar but 20 g protein, plus other.
Its an awesome flavor but resupply is likely a drag.