What kind of protein shakes?
Syntrax Nectar isn't premade, but it mixes super easy with water. I keep scoops in baggies and dump in half a bottle of water, shake, and drink! Depending on where you purchase it, it's about $.80/serving for 93cals and 23g protein. I've found that most of the premades tend to be higher in calories and I'd rather eat mine than drink them if I had the chance!

