11 month old question

Jessie 🌛 • Celine 💕❤️
Not about my baby but I'm just curious. Does an 11 month old get full with a 4 oz bottle every 3 hours ?? No food, just formula. My mil told my that my SIL hasn't tried introducing food to her 11 month old and well I'm not judging I'm just curious because this is my first baby and of course I question everything lol