The Isopure RTD in Passion Fruit is a 20oz bottle with 40 gms of protein. It has a little bit of a sweet grapefruit juice taste. No carbs, no aspartame. It's like drinking Crystal light, etc. I drink it throughout the day switching to water once I've met my protein requirement. There are lots of other flavors but I only like this one. You can order it online from The Vitamin Shoppe and shipping is free (currently). I'm not sure if they have it in their stores. I checked with my local GNC store and they did not have it but I could order online. However GNC shipping was not free.
