I am creating my own revolution and PAMdemonium reigns!
SW 270, CW 155, GW 135
1st 5k time 40:34 (Dec 2013)
On my pre-op diet I was able to drink protein drinks. I only had to have clear liquids for a few days after surgery(post-op). You may want to call and confirm whether you are to have clear liquids or just liquids. Protein drinks would provide more substance and energy for you.
I drank the low sodium chicken or beef stock in the box. When stock is made they use both the meat and veggies so it has a more rounded soup flavor. Broth is jus****er, meat, and bones. You would probably enjoy the stock better.