Aish, memang susah kan bila baby reject botol, a few of my mum friends had the same problem, especially kalau exclusive breastfeeding from the start. One thing that worked for a friend was warming the bottle suam-suam kuku (not too hot, same temp as breast milk), and try giving it when baby tengah happy mood, bukan hungry sangat or cranky, sebab kalau dia desperate lapar dia lagi degil. Another mum swears by letting someone else (bukan you, very important!) try feeding dengan botol, sometimes babies willing lebih if mak dia tak around, psychologically kat bawah sadar dia tahu mak ade susu lagi haha. Honestly though, at 4 months if breastfeeding is going well, you can actually push back giving the bottle for now and just focus on when you really need it, some babies just refuse until they're ready, and forcing it sometimes backfire. Mana tahu three weeks later dia boleh pulak, kids are like that.