Advantages:
1. Convenience similar to protein RTDs. Faster-acting liquid delivery form, though not as fast as protein RTDs.

2. Do not require mixing or any other preparation.

3. Varieties not limited to fruit flavors like protein RTDs.

4. Thicker, more filling consistency.

5. Typically milk-protein based, so they're rich in anti-catabolic, slow-release casein. Unless added, minimal carbohydrates and fat.