Clear broths (like chicken broth, beef broth, etc) were allowed when I did prep. Nothing like cream-based soup nor tomato soup were allowed, and nothing in the soup (no meat, noodles, etc). The last time I prepped, my hubby made chicken soup in the crock pot. I had the broth in the evening while I was prepping, and he ate the chicken. That worked out pretty well, and homemade broth is so much better than store-bought.
Good luck with your prep and capsule endoscopy!