I have to break up the fluid. 2 oz of protein shake then 15 minutes later 2 oz of water. 15 minutes later 2 oz of tea or coffee or soup them 2 oz of water. Then start over again. I bought high protein shake powders to reach the 60 to 80 oz requirements.
Pure Protein, Boost High Protein and Orgain are really good already mixed drinks. If you want to make them, I bought a baraitric protein shake book on amazon that has lots of fun recipes.