Aah I totally get this lah, my daughter was the same around that age, makan biasa je tapi susu memang struggle! A few of us mums tried mixing susu into porridge, pancakes, atau cheese pasta, campur halus-halus dalam makanan dia so he gets the nutrients tanpa perasan. Kalau pasal picky eater, one of my friends shared na she just offered different foods without forcing, and eventually anak dia expand his palate juga. For 11 months, as long as dia makan solid foods yang nutritious (say, chicken, veggies, rice), don't stress too much lah, though best to check with your pediatrician if you're worried about his nutrition, esp since he's not keen on milk.