My baby is 4 months old and I'm starting to introduce bottle to him with my pumped breastmilk but he is refusing and cries endlessly. How can I make him take the bottle?

I also had tis issue! It was super difficult period for me at that time, very stressed up as I want my bb to drink well and at the same time not waste the milk. Best way is to have patience and just slowly try. Can't rush into it as they are used to our breasts already. Have a schedule and try as and when, maybe starting once a day then twice. Use some toys to show bb so they can drink or find out what way seems to be helping them to drink then try it until they are ok and then U can do without all those distractions. Now my bb latches and drinks btl like a pro:)