Hello I am a week post-op but was concerned about your post. I have a notebook that was given to me pre-op with foods we can and cannot have.
First in the liquid stage the food must liquify upon body temperature, i.e., jello, pudding, yogurt, etc. and all must be sugar free. Tomato soup is a no-no because of the sugar content. Also a straw shouldn't be used for at least 6mths post-op. from what I have been told is that it can cause gastric problems.
Just trying to advise you and be helpfull, wouldn't want to see you getting sick or doing damage.