Pre-op diet
So weird. My preop diet (in 2003) didn't involve shakes at all, just 1,000 calories - low fat and high protein.
That being said, get what you like. I had Isopure recommended post op and I loathed them. The shakes I have now - I have one with iced coffee concentrate in the morning when I go to the gym - are Atkins Dark Chocolate. But again, what I like, you may hate.
Best of luck on your journey and let me know if I can do anything to help. At almost 10 years out, I've been through a lotta band life.
If you have time order lots of samples. You can find Unjury and Syntrax samples. I really like the Syntrax Nectar which are low carb. I also got the Premier Protein from Sams/Cosco/Wal-mart sometimes.
You are lucky, I had to get the Protein Powder kit from our center's source, BetterMD. I did find out from research a friend did that they are made by WonderSlim which anybody can buy.
My favorites were the Syntrax Nectar Cappuccino. I had bought 6 of the big tubs. I went thru the Cappuccino fast, than the Fuzzy Navel mixed with Orange Sunrise Crystal Light went next I also liked the Chocolate Truffle, Vanilla Bean and Strawberry. I HATED the natural Peach.
Good luck with the pre-op diet.