EBF to bottle help

Hi! So my LB has been EBF with the occasional bottle from birth. Bottles have always been expressed milk At about 3/4 months he refused to ever have a bottle again He is 5 months and try daily to give him bottle. He is drinking about an ounce before starting to pull faces and refuse again. I’ve tried different everything. Bottles, temperature, people, location. I’ve even tried formula! Any tips or suggestions