S.O.
Along with what the other ladies said I would start giving him cup. That was when my son started eating more of what we ate and he drank less from a cup than he would from me ( I breastfed and he never would take a bottle ) I started giving him a cup at mealtimes and still nursed at inbetween times and bedtime. Then gradually cut those out too. He still got the recommended amounts of milk ( I pumped but you can certainly put formula in a cup )
Good Luck!
S.