M.W.
Did your doctor say she was small for her age? My daughter is 2 and weighs 28 pounds, which is in the 50th percentile. By that, I'd say your daughter is doing pretty well. :)
If I remember correctly, around that age my eldest daughter who was my bottle baby, was on cereal & fruit at breakfast, a veggie for lunch and then a bottle for nap time; meat & veggie at dinner and then a bottle before bedtime. She had a sippy cup of watered-down juice or water with her meals. A bottle or cup of water was on hand throughout the day for little nips.