Is it because you hate the taste of the liquid, or you're just hungry? If your pre op, the doctor wants your liver to get smaller, it makes it an easier procedure.
I wasn't on a pure liquid diet, but the crappy tasting food they gave me, made me switch to a primarily liquid diet on my own. I drank Unjury protein powder with skim milk, and I would have chicken bouillion too, it's the only real thing I had that taster foodie, not sweet.
Just between you and me, I did have some canned tuna mixed with a small amount of fat free mayo. That helped. I confessed to my regular primary doctor, and he said that wouldn't add fat to my liver, and I was safe. LOL