Refuse bottle feeding

My baby is 8month+ now. He was mixed feeding before. Since we start solid for him after 6 month , he refuse to take bottle (we use Similac brand). Yes he still taking my breast feeding, solid 3 to 4 times per day. Any one knows why like this. Wondering he don’t like the taste of Similac or don’t like bottle feeding. Should I change another formula brand? Any recommendation? Thanks in advance.